Key Concept: Fundamental Characteristic

b) Productive agriculture to sustain cities
[Solution Description]
The syllabus poses a "THINK ABOUT IT" question asking which characteristic is most fundamental. Productive agriculture feeds villages and cities, enabling other developments like urbanism, crafts, and trade.

Key Concept: Fundamental Characteristic

b) Productive agriculture
[Solution Description]
The syllabus prompts readers to think about the most fundamental characteristic that enables the development of all other aspects of a civilisation. Among the options, productive agriculture is essential as it supports the population, including non-farming urban dwellers.

Key Concept: Timeline of Civilisations

d) Ancient Egyptian civilisation
[Solution Description]
The syllabus's timeline shows the Indus-Sarasvatī civilisation from about 2600 to 1900 BCE, Mesopotamian civilisation earlier, and Egyptian civilisation beginning around 3000 BCE.

Key Concept: Writing, Trade

d) Development of a script or writing system
[Solution Description]
Writing systems were essential for documenting transactions, agreements, and inventories in trade. This allowed civilisations to maintain records of goods exchanged, debts owed, and commercial laws, enabling trust and consistency in trade networks spanning different regions.

Key Concept: Characteristics of Civilisation

a) Nomadic lifestyle
[Solution Description]
According to the syllabus, key characteristics of a civilisation include government and administration, urbanism, crafts, trade, writing, cultural ideas, and productive agriculture. The correct answer should identify an option that does not fit these defining traits.

Key Concept: Fundamental Characteristic

b) Productive agriculture
[Solution Description]
The syllabus mentions that productive agriculture is essential to feed not just villages but also cities, making it fundamental for sustaining other characteristics like urbanism and trade.

Key Concept: Great Bath, Urban infrastructure, Public architecture

d) Served ritualistic/communal purposes likely linked to religion
[Solution Description]
The Great Bath's elaborate construction, precise measurements, and waterproofing suggest it was used for ritualistic or communal bathing, possibly with religious significance.

Key Concept: Economic Factors

c) Lack of agricultural techniques
[Solution Description]
The syllabus does not provide economic comparison details.

Key Concept: Historical Comparison

a) Lack of advanced technology
[Solution Description]
With no syllabus data, an accurate comparison cannot be made.

Key Concept: Agriculture, Urbanism, Craftsmanship

d) Skilled labour and resources were uniformly available or regulated.
[Solution Description]
Uniform construction quality across different house sizes suggests standardised craftsmanship and urban planning. It implies a well-organised society where resources and skills were equitably distributed or regulated, reflecting advanced urbanism and governance. This challenges the notion of extreme social stratification.

Key Concept: Administration

c) Government and administration
[Solution Description]
According to the syllabus, a civilisation must have some form of government and administration to manage a more complex society and its many activities. The correct answer is the option that mentions government and administration.

Key Concept: Trade, Urbanism

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The assertion states that the Harappan trade networks were supported by urban planning and infrastructure like dockyards. This is true, as archaeological evidence shows well-planned cities and structures like the Lothal dockyard facilitating maritime trade. The reason correctly explains this by highlighting how urban features (wide streets, dockyards) aided trade management, making the reason a valid explanation for the assertion.

Key Concept: Agriculture, Urbanisation, Timeline

c) 1400 years
[Solution Description]
The Mesopotamian civilisation began around 4000 BCE, while the Indus-Sarasvatī civilisation started around 2600 BCE. The time difference between these two civilisations is calculated as: $4000 \text{ BCE} - 2600 \text{ BCE} = 1400 \text{ years}$.

Key Concept: Decline of Harappan Civilisation

c) Climatic changes and drying of rivers
[Solution Description]
The Harappan civilisation declined due to climatic changes causing reduced rainfall and the drying up of the Sarasvatī River.

Key Concept: Urban Planning, Decline of Harappan Civilisation

a) Military conquests by foreign invaders
[Solution Description]
The decline of the Harappan civilisation is attributed to climatic changes and environmental factors such as reduced rainfall and the drying up of the Sarasvatī River. There is no evidence suggesting warfare or invasions caused its decline. Therefore, military conquests were not a contributing factor.

Key Concept: Harappan Urban Planning, Trade Networks

d) They established long-distance trade connections by land and sea
[Solution Description]
The discovery of Harappan artifacts like carnelian beads in Susa (Iran) and an ivory comb in Oman shows that the Harappans had established long-distance trade connections through both land and maritime routes. These findings indicate their trade extended to regions beyond the Indian subcontinent. Additionally, the uniform town planning across major cities suggests centralized administration which would have facilitated such extensive trade networks.

Key Concept: Important Cities and Modern States/Regions

d) Gujarat
[Solution Description]
According to the syllabus, Dholavira is located in Gujarat. So, the correct option is Gujarat.

Key Concept: Indus-Sarasvatī Basin

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that the Sarasvatī River was important for the Indus-Sarasvatī civilisation. This is true because many cities like Rakhigarhi and Ganweriwala developed along the Sarasvatī basin. The reason mentions that the Ṛig Veda describes the Sarasvatī River as flowing from the mountain to the sea, which is correct as per ancient texts. However, the reason alone does not directly explain why the river was crucial for the civilisation’s development, as other factors like agriculture and trade also contributed. Thus, both statements are true, but the reason does not fully explain the assertion.

Key Concept: Decline, Environmental factors

c) Climatic and environmental changes.
[Solution Description]
Archaeological evidence suggests that climatic and environmental changes, such as the drying up of rivers like the Sarasvatī, led to agricultural disruptions. This forced people to abandon urban centers and return to rural lifestyles.

Key Concept: Geographical Spread

c) The civilisation extended far beyond the Indus region.
[Solution Description]
The syllabus mentions that archaeological discoveries have shown the civilisation extended beyond the Indus region, making the term 'Valley' outdated.

Key Concept: Naming conventions, Excavation history

c) Because Harappa was the first excavated site of this civilization.
[Solution Description]
The term "Harappan" is derived from Harappa, the first city of this civilization to be excavated in 1920–21. Since it was the initial discovery site, archaeologists named the entire civilization and its inhabitants after Harappa.

Key Concept: Characteristics of Urban Growth

b) Wide streets aligned to cardinal directions
[Solution Description]
The larger Harappan cities were built according to precise plans with wide streets often oriented to cardinal directions. They had fortifications and distinct upper and lower towns, indicating advanced urban planning.

Key Concept: Harappan Urban Planning, Decline of Indus-Sarasvatī Civilisation

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that Harappan cities had precise urban planning for efficient trade and governance, which is true as archaeological evidence shows planned streets and structures aligned to cardinal directions. The reason claims that the existence of fortifications and segregated town areas signifies an organized administration that managed urban growth. Both statements are correct. However, while the reason highlights features of urban organization, it does not directly explain why streets were oriented to cardinal directions, which was likely influenced by practical needs like efficient movement and possibly cosmological beliefs. Thus, the reason supports the assertion but does not fully explain the specific claim about street orientation.

Key Concept: Decline of Urban Settlements

c) 1900 BCE
[Solution Description]
The Indus-Sarasvatī civilization began to decline around 1900 BCE. Cities were abandoned, and inhabitants adopted a rural lifestyle due to possible environmental changes and administrative collapse.

Key Concept: Decline of Indus-Sarasvatī Civilisation

b) Cities were abandoned, and people turned to rural life
[Solution Description]
Around 1900 BCE, the cities of the Indus-Sarasvatī civilisation were abandoned, and the people adopted a rural lifestyle due to environmental changes and the collapse of administration.

Key Concept: Decline of Indus-Sarasvatī Civilisation

b) Environmental changes leading to rural lifestyle
[Solution Description]
The syllabus mentions that archaeologists have proposed multiple factors such as environmental changes leading to ruralization and abandonment of cities. Warfare was earlier thought to be a reason, but current views suggest environmental or administrative collapse played a bigger role.

Key Concept: Ancient Civilisations

c) Egyptian and Mesopotamian civilisations
[Solution Description]
The Egyptian and Mesopotamian civilisations also began around the time of the Indus-Sarasvatī civilisation, as indicated by the timeline in the syllabus.

Key Concept: Water Management

b) Using underground drains connected to home bathing areas
[Solution Description]
Harappan cities had an advanced drainage system where waste water from homes was channeled into drains running below the streets. This network ensured cleanliness and proper sanitation, reflecting their emphasis on water management.

Key Concept: Fortification, Urban Structure

c) The society had a hierarchical structure with centralized urban planning.
[Solution Description]
The presence of fortifications indicates defense needs, while the division into upper and lower towns suggests social stratification—elites lived in the upper town, commoners in the lower town. The uniform brick quality implies standardized construction techniques.

Key Concept: Urban Planning in Harappan Cities

b) Wide streets oriented to cardinal directions
[Solution Description]
The Harappan cities were known for their precise urban planning. They had wide streets oriented to cardinal directions, fortifications, and distinct upper and lower towns. This systematic layout is a key feature of their urban planning.

Key Concept: Archaeological Evidence, Urban Differentiation

c) Basic planning concepts were adapted to local conditions
[Solution Description]
Dholavira had three zones (unlike most Harappan cities' two), showing urban planning wasn't uniform but adapted to local needs. The stone foundations at Dholavira indicate regional variations in construction techniques too. This proves Harappan cities followed general principles (like zoning) but implemented them flexibly based on geographical and functional requirements.

Key Concept: Urban Planning, Fortifications

d) For organized defense and maintaining social hierarchy
[Solution Description]
The wide streets in cardinal directions facilitated systematic urban planning and movement. The separation into upper town (for elites) and lower town (for common people) served both social stratification and defensive purposes. The orientation helped in creating an organized layout which was easier to defend with fortifications while maintaining clear societal divisions.

Key Concept: Fortifications and Layout

d) To provide protective barriers against external threats
[Solution Description]
According to the syllabus, fortifications were massive walls built around settlements or cities for protection. The primary purpose of these structures was defensive, ensuring safety from potential threats such as invaders or natural calamities.

Key Concept: Town-Planning

b) Lothal
[Solution Description]
The syllabus mentions that Lothal was a smaller but significant Harappan site known for its dockyard, suggesting it was an important center for trade.

Key Concept: Discovery Year

b) 1924
[Solution Description]
The syllabus states that Harappa and Mohenjo-daro were first discovered in 1924.

Key Concept: Archaeological Discovery, Urban Features

b) Rakhigarhi
[Solution Description]
Rakhigarhi in Haryana has been actively excavated in recent years and has revealed uniform construction quality across house sizes. The syllabus mentions Haryana has high site density with multiple cities/towns like Farmana, Bhirrana etc. It contrasts older discoveries like Harappa (1924).

Key Concept: Great Bath and Harappan Urban Planning

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The syllabus mentions that the purpose of the Great Bath remains debated among archaeologists. However, its elaborate design with waterproofing materials (bitumen), careful brickwork, and a drainage system suggests it was meant for special purposes like religious rituals rather than everyday public bathing. Most houses in Mohenjo-daro already had individual bathrooms, ruling out the possibility of the Great Bath being a public bath. Thus, the assertion aligns with one of the interpretations provided in the syllabus. The reason correctly describes the features of the Great Bath that support its specialized use, thereby explaining the assertion.

Key Concept: Homes, Streets, Building Materials

c) It indicates a society that valued equality in living standards.
[Solution Description]
The syllabus states that both small and large houses were built with the same quality of bricks and construction techniques. This suggests an egalitarian approach to housing, where even smaller homes were not inferior in build quality. It challenges the typical hierarchy seen in other ancient civilizations, where elite residences were far superior. The perpendicular streets and stone foundations in Dholavira further indicate organized, community-focused urban design.

Key Concept: Great Bath Purpose

c) A tank for religious rituals
[Solution Description]
The Great Bath was a small but elaborate tank with waterproofing materials and rooms around it. Since most houses had private bathrooms, the interpretation that it was a public bath is unlikely. Archaeologists suggest that it may have been used for religious rituals or by royalty, given its sophisticated design.

Key Concept: Harappan Water Management

a) To store excess water during heavy rainfall
[Solution Description]
The reservoirs in Dholavira were built with stones or cut into rock and connected through underground drains. These structures were designed for efficient water storage, harvesting, and distribution, ensuring a steady water supply to the city.

Key Concept: Water management, Reservoir construction

b) 2665 m$^2$
[Solution Description]
Given:
Length ($L$) = 73 m
Width-to-length ratio = 1:2 ⇒ Width ($W$) = $L/2$ = 73/2 = 36.5 m
Area ($A$) = $L \times W$ = 73 $\times$ 36.5 = 2664.5 m$^2$.
Hence, the closest approximate area is 2665 m$^2$.

Key Concept: Water Management in Harappan Civilization

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The Assertion states that the Great Bath was likely used for religious rituals, which is one of the interpretations proposed by archaeologists. The Reason given is that most houses had individual bathrooms, making a public bath unnecessary. Both statements are true based on the syllabus content. However, while the Reason provides context for why the Great Bath might not have been a public bath, it does not directly explain why it was specifically used for religious rituals. Hence, the Reason is not the correct explanation of the Assertion.

Key Concept: Water Management, Drainage Systems

c) Assertion is true, but Reason is false.
[Solution Description]
The assertion states that the Harappans built an advanced drainage system to maintain cleanliness and prevent water stagnation, which is true as evidenced by the underground drains found in cities like Mohenjo-daro and Lothal. However, the reason claims that the Great Bath was connected to underground drains, which is false because while the Great Bath had its own drain to empty and refill water, it was not part of the larger drainage network. Thus, the assertion is true, but the reason is false.

Key Concept: Water Management - Drainage System

c) Bricks
[Solution Description]
The Harappans built their drainage systems with bricks. These drains were carefully laid out under the streets to manage wastewater efficiently. Brick construction ensured durability and proper channeling of water. No other materials like wood, stone, or metal are mentioned as primary for constructing these drains.

Key Concept: Labor management, historical context

c) Barter system or provision of essential goods
[Solution Description]
In ancient economies, labor was often compensated through barter systems (e.g., food, goods) or community service obligations under centralized authority, aligning with archaeological evidence of organized urban planning.

Key Concept: Underground Drain Connection

c) To efficiently harvest and distribute water
[Solution Description]
The underground drains in Dholavira were primarily constructed for efficient water harvesting and distribution. This system ensured that water could be moved between reservoirs as needed, optimizing storage and usage without relying on manual transportation methods.

Key Concept: Drainage System, Municipal Administration

c) Their administration was capable of organizing large-scale public projects.
[Solution Description]
The presence of a well-planned drainage system indicates a highly organized municipal administration capable of coordinating large-scale public works. Such infrastructure required centralized planning, labor management, and maintenance, suggesting the existence of a governing authority responsible for urban sanitation and cleanliness.

Key Concept: Cleanliness in Harappan Civilisation

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The Harappan civilization is well-known for its advanced urban planning, which included a sophisticated drainage system. Archaeologists have found evidence of brick-lined drains that carried wastewater from houses to larger underground sewers. This shows their emphasis on maintaining cleanliness and sanitation in their cities. Therefore, both the Assertion and Reason are true, and the Reason correctly explains the Assertion.

Key Concept: Agricultural Techniques, Rural-Urban Dependence

b) A centralized urban economy reliant on rural surplus
[Solution Description]
The syllabus states that cities depended on daily agricultural produce from villages, indicating a centralized urban economy sustained by rural surplus. This rules out self-sufficient cities or minimal trade. While crafts existed, food supply was critical. Administrative coordination is implied but not explicit.

Key Concept: Harappan Agriculture Tools

b) Plough
[Solution Description]
Archaeological evidence shows that the Harappans used ploughs for farming, some of which have been found as clay models. Ploughs are still used in modern agriculture.

Key Concept: Harappan Agricultural Tools

b) Plough
[Solution Description]
Archaeological findings reveal that the Harappans used ploughs for farming. A small clay model of a plough was found in Banawali, Haryana, showing its historical significance and continued use in modern agriculture.

Key Concept: Harappan Agriculture

c) For access to water and fertile soil for agriculture
[Solution Description]
The Harappans settled near rivers for easy access to water and fertile soil enriched by river deposits, which supported their agriculture. This allowed them to grow cereals, pulses, and cotton efficiently.

Key Concept: Trade, Seals

d) The seals reflect cultural significance and possibly trade-related functions.
[Solution Description]
Harappan seals depict animals like unicorns, bulls, and horned tigers, suggesting cultural or religious significance of these animals. Their detailed craftsmanship also indicates advanced artistic skills and possible trade-related uses for identification.

Key Concept: Diet

c) Dairy products and spices like turmeric and ginger
[Solution Description]
Scientific examinations of Harappan clay pots have revealed remains of dairy products, turmeric, ginger, and banana, indicating a diverse diet.

Key Concept: Crops Grown by Harappans

c) Maize
[Solution Description]
According to the syllabus, the Harappans grew cereals like barley, wheat, millets, rice, and pulses including beans, peas, and lentils. Cotton was also cultivated. Maize, however, is not mentioned in the syllabus as a crop grown by the Harappans.

Key Concept: Crop Cultivation

c) Cotton
[Solution Description]
The Harappans were pioneers in cultivating cotton in Eurasia. They used it to weave clothes. While they also grew wheat, barley, and pulses, cotton was their unique contribution to early agriculture in the region.

Key Concept: Terracotta whistle

b) Karanpura
[Solution Description]
The small terracotta whistle was unearthed in Karanpura, Rajasthan, showcasing the craftsmanship of the period.

Key Concept: Harappan Agriculture and Dietary Practices

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The Assertion states that the Harappans used agriculture and domesticated animals for food, which is supported by archaeological evidence like plough models and animal bones. This is true as per the syllabus. The Reason mentions the diversity in their diet through findings in pottery, which is also accurate based on scientific examinations. Moreover, the Reason correctly explains why the Harappans had a stable food supply (due to diverse agricultural and dietary practices), making it the correct explanation for the Assertion.

Key Concept: Bronze Production

d) To produce a harder metal suitable for tools and artifacts
[Solution Description]
The Harappans added tin to copper to create bronze, which is harder and more durable than pure copper. This improved the quality of tools, utensils, and figurines.

Key Concept: Trade Networks

d) Ships and sea routes
[Solution Description]
The Harappans used maritime routes (sea travel) for long-distance trade, as evidenced by coastal settlements like Lothal, which had dockyards.

Key Concept: Trade Routes

c) Through land routes, rivers, and maritime routes
[Solution Description]
The Harappans used land routes, rivers, and maritime routes for trade. Coastal settlements like Lothal had dockyards, indicating intensive maritime activity for long-distance trade.

Key Concept: Bronze production, Trade implications, Resource scarcity

d) They depended on trade to acquire copper, emphasizing expansive trade networks.
[Solution Description]
Since the Harappans lacked abundant copper sources locally, they had to import copper from external regions through trade. The necessity of importing copper highlights their dependence on long-distance trade networks to acquire essential raw materials. Furthermore, since bronze was crucial for tools, utensils, and figurines, securing steady copper supplies would have been a priority. This reliance on trade underscores the sophistication of their trade networks, which spanned both inland and maritime routes to procure vital resources.

Key Concept: Harappan Trade and Exports

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The syllabus states that the Harappans were indeed the first in Eurasia to grow cotton and weave it into clothes (Assertion is true). It also mentions that cotton was one of their exports, along with ornaments like carnelian beads (Reason is true). However, the Reason does not explain why the Harappans were the first to grow cotton; it only states a fact about their trade. Thus, the Reason is not the correct explanation of the Assertion.

Key Concept: Harappan Trade and Export Items

c) Carnelian beads
[Solution Description]
The Harappans exported various items, but carnelian beads were one of the most favored ornaments. These beads were made from a reddish semiprecious stone found mostly in Gujarat. Harappan craftspeople developed special techniques to drill and decorate these beads.

Key Concept: Dockyard at Lothal

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that the dockyard at Lothal was used for maritime trade, which aligns with historical evidence suggesting its role in trade activities. The reason provides specific dimensions of the basin (217m x 36m), supporting the idea that it could accommodate boats. However, while both statements are true, the reason does not directly explain why the dockyard was used for trade; it only confirms its size, which is a supporting detail rather than an explanation. Therefore, the reason is not the correct explanation of the assertion.

Key Concept: Dockyard at Lothal, Maritime Trade

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that the large basin at Lothal was primarily used for maritime trade, not irrigation. This is supported by the syllabus, which describes the basin as a dockyard meant for receiving and sending boats. The reason mentions the discovery of seals and beads indicating trade networks. These seals and beads indeed signify long-distance trade, but they do not directly explain why the basin was used for maritime trade specifically. Thus, both statements are true, but the reason does not correctly explain the assertion.

Key Concept: Harappan seals material, trade significance

c) Steatite was favored for its softness when raw and hardened through heating to ensure durability.
[Solution Description]
The Harappans used steatite for seals because it is a soft stone that could be easily carved when raw but hardened upon heating, making it durable for trade purposes. This hardening process ensured the seals could withstand repeated use in marking goods.

Key Concept: Material of Harappan Seals

c) Steatite
[Solution Description]
Harappan seals were primarily made of steatite, a soft stone that was hardened by heating. This is explicitly mentioned in the syllabus under "Harappan Seals."

Key Concept: Materials used by Harappans

c) Tin
[Solution Description]
The Harappans mixed tin with copper to make bronze, which is harder than copper. This information is directly mentioned in the syllabus.

Key Concept: Craftsmanship Technique

d) Shaping them into bangles
[Solution Description]
Harappan artisans demonstrated remarkable craftsmanship by working with hard materials like shells. They developed sophisticated techniques to shape conch shells into beautiful bangles, which required advanced skills as shell is a hard material to work with.

Key Concept: Harappan Trade, Cultural Practices

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that Harappan trade networks extended beyond the Indian subcontinent. This is true, as archaeological evidence shows Harappan goods reaching places like Mesopotamia. The reason mentions carnelian beads being a favored export item, which is also true, as they were commonly found in Gujarat and required advanced drilling techniques. However, the reason does not explain why their trade networks extended beyond India; it only describes one of their export items. Therefore, both assertion and reason are true, but the reason is not the correct explanation of the assertion.

Key Concept: Harappan Trade

b) Carnelian
[Solution Description]
The Harappans were skilled in crafting ornaments, especially beads made from carnelian, a reddish semiprecious stone found mostly in Gujarat. These beads were highly valued and traded extensively. They developed special techniques to drill holes through these beads and decorate them, making them suitable for threading into necklaces or other jewelry.

Key Concept: Bronze tools, Harappan metallurgy

d) 1:9 (10% tin)
[Solution Description]
Bronze is an alloy made by adding tin to copper. Pure copper is too soft for tools like chisels, while adding too much tin makes the alloy brittle. Archaeologists have found that Harappans used an optimal tin-to-copper ratio of approximately 1:9 (10% tin and 90% copper) for tools like chisels, balancing hardness and malleability.

Key Concept: Objects of daily use - Bronze tools

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The assertion states that the Harappans used bronze chisels as tools for carving and cutting, which is correct as per the syllabus mentioning the use of bronze tools. The reason states that bronze was a commonly used metal during the Harappan civilisation, which is also true as per the syllabus. Moreover, the reason correctly explains why bronze chisels were used - because bronze was commonly available and used for making tools. Therefore, both the assertion and reason are true, and the reason correctly explains the assertion.

Key Concept: Purpose of Ancient Toys

b) They had developed leisure time activities
[Solution Description]
The syllabus states that Harappans designed games/toys to keep people amused, indicating leisure activities were part of their lifestyle. This shows they had time beyond just basic survival needs.

Key Concept: Historical significance, Cultural practices

c) 5
[Solution Description]
The craftsman takes 2 days to make one whistle. In 10 days, the number of whistles he can make is calculated by dividing the total days available by the days taken per whistle: $\frac{10\,\text{days}}{2\,\text{days/whistle}} = 5$ whistles. Thus, he can make 5 whistles in 10 days.

Key Concept: Dancing Girl Figurine

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The 'Dancing Girl' figurine is a bronze statue found in Mohenjo-daro, depicting a woman with multiple bangles on one arm. This style of wearing bangles is still seen today in some regions of Gujarat and Rajasthan, suggesting that certain cultural practices have persisted since the Harappan civilization. Therefore, both the Assertion and Reason are true, and the Reason correctly explains the Assertion as it highlights the cultural continuity from ancient to modern times.

Key Concept: Cultural significance, Figurines analysis

b) It reflects a continuity of cultural practices seen in modern-day Gujarat and Rajasthan.
[Solution Description]
The 'Dancing Girl' figurine showcases bangles covering an entire arm, which reflects a unique cultural practice. This style is still observed in parts of Gujarat and Rajasthan today, indicating continuity or influence of ancient traditions in modern regional customs. The adornment suggests that such jewelry was significant in social identity or ritualistic practices during the Indus Valley period.

Key Concept: Storytelling Continuity

b) Oral storytelling traditions existed and persisted
[Solution Description]
The depiction of the thirsty crow story on the Lothal pot indicates oral storytelling traditions that have persisted for over 4,000 years. This suggests cultural continuity in narratives passed down through generations.

Key Concept: Storytelling Continuity

d) The longevity of oral traditions and storytelling methods
[Solution Description]
The design on the pot from Lothal appears to tell the story of the thirsty crow, a narrative that has been passed down through oral traditions for over 4,000 years. This demonstrates how storytelling methods and narratives have persisted across millennia.

Key Concept: Harappan Lifestyle After Decline

d) Rural lifestyle
[Solution Description]
The syllabus explains that after the decline of the cities, any remaining inhabitants returned to a rural lifestyle, which provided easier access to food and water compared to urban living.

Key Concept: Climatic Change and Decline of Civilisation

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The assertion correctly identifies climatic change as a major factor behind the decline of the Sindhu-Sarasvatī civilisation, particularly emphasizing reduced rainfall and the drying up of the Sarasvatī River. These environmental shifts directly impacted agricultural productivity, which was the backbone of urban sustenance. The reason accurately explains why these climatic changes led to the abandonment of cities: diminished agricultural output made urban life unsustainable, prompting a shift to rural settlements where access to food and water was more manageable. Thus, both the assertion and reason are true, and the reason logically explains the assertion.

Key Concept: Decline of the Harappan Civilization

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The syllabus states that two key factors led to the decline of the Harappan civilization: climatic changes (reduced rainfall) and the drying up of the Sarasvatī River. While both statements are true as per the syllabus, the drying up of the Sarasvatī River is specifically mentioned as causing the abandonment of cities like Kalibangan and Banawali. Thus, while reduced rainfall contributed to agricultural difficulties, it is not the direct explanation for the abandonment of these specific cities. Therefore, the Reason does not correctly explain the Assertion.

Key Concept: Harappan culture survival, Post-urban continuity

c) Its culture and technology were largely passed on
[Solution Description]
Harappan technology, crafts, and cultural practices were preserved and passed on to subsequent phases of Indian civilization, even as urban centers declined. This continuity highlights cultural resilience.

Key Concept: Impact of Sarasvatī River Drying

c) It forced the abandonment of cities in the central basin
[Solution Description]
The Sarasvatī River drying up in its central basin led to the abrupt abandonment of cities like Kalibangan and Banawali. This environmental catastrophe disrupted agriculture and water supply, forcing people to migrate to rural areas where resources were more accessible.

Key Concept: Decline of Harappan Civilisation

b) Climatic changes reducing rainfall
[Solution Description]
The Harappan civilisation declined partly due to climatic changes that reduced rainfall and dried up rivers like the Sarasvatī, making agriculture difficult.

Key Concept: Harappan civilization, decline factors

d) Assertion is false, but Reason is true.
[Solution Description]
The assertion claims that the decline of the Harappan cities was primarily due to invasions and warfare. However, archaeological findings contradict this claim, as there is no evidence of warfare, weapons, or destruction by invaders in Harappan sites. This indicates that the Harappans were a peaceful civilization. The reason correctly states the absence of such evidence but does not explain the assertion, which is false. Therefore, the correct relationship between the two statements is that the Assertion is false, but the Reason is true.

Key Concept: Harappan Society

c) There was no need as they were a peaceful society
[Solution Description] The archaeological evidence suggests that the Harappan civilization was relatively peaceful, with no traces of warfare or invasion. This indicates they did not prioritize maintaining an army or weapons, possibly due to stable social and political conditions.

Key Concept: Decline of Civilization

c) Abandonment of cities like Kalibangan
[Solution Description]
The syllabus states that the drying up of the Sarasvatī River led to the abandonment of cities such as Kalibangan and Banawali. The inhabitants who remained adopted a rural lifestyle as the earlier administration collapsed.

Key Concept: Sarasvatī River Drying

d) Disruption of water supply for agriculture
[Solution Description]
The Sarasvatī River was a vital water source for agriculture and daily life. Its drying disrupted the water supply, making survival unsustainable in these cities, leading to their abandonment as people sought reliable water sources elsewhere.

Key Concept: From Village to City: Characteristics of Harappan Civilisation

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The assertion states that Harappan cities displayed advanced urban planning through well-planned streets and drainage systems. This is true as per the syllabus, which mentions precise town-planning in Harappan cities, including wide streets oriented to cardinal directions and effective water management. The reason claims that urbanism is a defining characteristic of a civilisation, which is also correct as the syllabus explicitly lists urbanism (town-planning, city growth, and water management) as one of the essential features of a civilisation. Moreover, the reason correctly explains why the Harappan cities qualify as part of a civilisation—because they exhibit urbanism.

Key Concept: Decline of Harappan Civilisation

c) 1900 BCE
[Solution Description]
The Sindhu-Sarasvatī civilisation began to decline around 1900 BCE, leading to the abandonment of cities and a shift to rural lifestyles as the earlier administrative systems collapsed.

Key Concept: Urban Features

c) $12 \times 7$ meters
[Solution Description]
The Great Bath in Mohenjo-daro was an elaborate structure measuring approximately 12 meters by 7 meters. It featured waterproofing materials like natural bitumen over carefully laid bricks, indicating advanced engineering skills.

Key Concept: Urban Structure

b) Upper town and lower town
[Solution Description]
The Harappan cities had two distinct parts: the 'upper town' where the elite lived and the 'lower town' where common people lived.

Key Concept: Domestication

c) Cow
[Solution Description]
The syllabus indicates that the Harappans domesticated animals for meat consumption, as evidenced by animal bones found during excavations. While specific animals aren't listed, this confirms domestication practices.

Key Concept: Agriculture, Dietary Practices

b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
[Solution Description]
The assertion states that the Harappans' agricultural surplus could sustain urban centers without external trade. This is true because archaeological evidence indicates intensive cultivation of cereals like wheat, barley, and millets, along with pulses. The reason mentions excavations revealing grain remains in both rural and urban sites, supporting the claim of abundant food production. However, while the reason provides evidence for food availability, it does not fully explain whether cities relied solely on local agriculture or also engaged in trade for sustenance. Thus, both statements are true, but the reason does not completely justify the assertion.

Key Concept: Harappan Seals

c) To identify traders and their goods
[Solution Description]
The thousands of small seals found in Harappan settlements were likely used by traders to identify their goods and each other. This practice facilitated organized and efficient trade within and beyond their civilization.

Key Concept: Harappan Trade and Technology

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
[Solution Description]
The assertion states that the Harappans were skilled in producing carnelian beads, which is true as per the syllabus. The reason explains that these beads required specialized drilling techniques, also true as mentioned in the syllabus. Moreover, the reason correctly explains why the assertion is true, as the advanced techniques highlight their skill in bead production.

Key Concept: Harappan Lifestyle

c) Easier access to food and water
[Solution Description]
A rural lifestyle provided easier access to food and water compared to urban areas. Cities depended on villages for food supply, which became unreliable due to climatic changes and the drying up of rivers. Thus, people moved to rural settlements for survival.

Key Concept: Decline of the Harappan Civilisation

b) Reduced rainfall and a drier climate
[Solution Description]
The decline of the Harappan civilisation is attributed to climatic and environmental changes, particularly reduced rainfall and the drying up of the Sarasvatī River. These factors made agriculture difficult and disrupted food supplies to cities, leading people to abandon urban settlements.