Question

Why is Aravali called the lifeline of Rajasthan?

Answer 1

Many rivers goes from that aravali range

Answer 2

Answer:

In short mountains catches the cloud and this is the only way through which Rajasthan has its rain.

And it also prevented the desertification of rest of the Rajasthan. You can go through the maps you can clearly see the left side is desertic area and right of the mountain is greenish or decidious forest.