Question

what is babar and terai

Answer 1

bhabar is the narrow belt of the plain which is covered with pebbles and lies along the foothills of the shivaliks from the indus to the teesta
south of bhabhar the streams and rivers re-emerge and create a wet swampy and marshy region is known as terai

Answer 2

The river, after descending from the mountains deposit pebbles in a narrow belt of about 8 to 16km in width lying parallel to the slopes of the shiwaliks is known as bhabar.

swampy and marshy region is known as terai.