Question

why are the north Indian plains so densely populated?​

Answer 1

There are many reasons for it:-

Because of its climate

Because of its farming advantage

And many more

Answer 2

Answer:

The northern plains are densely populated due to the fine alluvium deposit which makes the plain very fertile.

Hence, many farmers prefer to settle here, people also settle here as it is the best land form to settle on and it has many facilities.

Hope it helps you.