Question

what happens if himalayas are absent on the earth?

Answer 1

Without Himalayas, Cold and moisture-less winds from Siberia, Central Asia and Gobi Desert would enter the subcontinent owing to North East trade winds and Horse latitudes.

Answer 2

if Himalayas are absent on earth or India then india will become very cold because Himalayas act as a barrier and prevent Hails and very strong cold winds to enter in India and hence keep our climate moderate