Question

how does northern plains formed​

Answer 1

Answer:The northern plains were formed from crumbling alluvium from the himalayan mountains. It crumbled due to rain, wind and weathering.

Explanation:

Answer 2

Answer:

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.