Question

what things make northern plain fertile ​

Answer 1

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.

Answer 2

Answer:

The rivers in the northern plain flow through the mountains and deposit many minerals and silt. Thus, it makes the northern plain so fertile.

Explanation:

When the rivers deposits the minerals, it makes the northern plain fertile.