Question

why are the northern plains fertile and rich?​

Answer 1

Answer:

because of water and silt brought by rivers which are perennial

Answer 2

Answer:

The silt deposited by river Ganga and its tributary makes the plain fertile. northern plain fertile because when the river ganga flow there it cannot carry so much silt with it so it deposits it on the bank so they are fertile since they carry alluvium with them . Thus the northern plains are very fertile.

Explanation:

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