Question

how were the northern plains created​

Answer 1

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.

Answer 2

Answer:

the northern plains are created because of the silt depositions of the Himalayan rivers which makes the plains fertile