Question

Indo gangetic plains have high population
​

Answer 1

Indo gangetic Plains are most densely places among the world. the population was exceeding to 400 million

Answer 2

Answer: Water is essential for human life to exist.

Explanation:- Plains are formed when alluvium is deposited by rivers, which is fertile and it helps in agricultural activities. Indo gangetic plains are formed by the alluvium brought by Ganga and its tributaries. So it's a fertile region, Water requirements are also fulfilled by these rivers which attract a large population. Industries also setup near these regions as fertile plains support crop production and due to are being plain transport is easy.