Question

How the northern plain of india form

Answer 1

it is formed by the interplay of three major rivers ganga Brahmaputra and Indus.

Answer 2

The Northern Plain was formed by the deposits brought in by the three major rivers and their tributaries. Alluvium was deposited at the foot–hills of the Himalayas for millions of years. These deposits are now the fertile Northern Plains. Alluvium is soil or sediments deposited by a river or other running water.