Correct Option
The correct option is 1 and 3 only.
Explanation
The spatial distribution of population in India is uneven and is primarily determined by the interplay of physical factors (terrain, climate, water availability) and socio-economic factors (agriculture, industrialization, urbanization). Regions with favorable physical environments and economic opportunities historically support higher population densities.
Statement-wise Analysis
- Statement 1 is Correct: The North Indian Plains, comprising the states of Uttar Pradesh, Bihar, West Bengal, and parts of Punjab and Haryana, possess a high concentration of population. This is attributed to the flat terrain, fertile alluvial soil suitable for intensive agriculture, abundant water availability from perennial rivers, and a favorable climate. These factors have historically supported large human settlements.
- Statement 2 is Incorrect: The development of irrigation facilities, specifically the Indira Gandhi Canal in Rajasthan, has transformed the semi-arid regions into agricultural zones. This availability of water for drinking and cultivation has attracted settlements and increased population concentration in these areas, rather than causing a decline.
- Statement 3 is Correct: India's coastal regions have historically been areas of high population concentration due to fertile deltas, favorable climate for agriculture (especially rice cultivation), and opportunities for trade and transport. Despite emerging environmental challenges such as soil degradation, salinity ingress, and groundwater depletion, these regions continue to maintain high population densities due to established economic infrastructure and urbanization.
Key Takeaway
Key Takeaway: Population distribution in India is heavily skewed towards regions with flat terrain, fertile soil, and water availability (North Indian Plains and Coastal Plains), while the introduction of resources like irrigation can increase population density in historically sparse regions like Rajasthan.