Question

How are Himalayas useful to us

Answer 1

1 prevent from cold winds from central Asia
2 cause rainfall
3 forest here provide various products4 source of many rivers.

Answer 2

Well they're
1>The Himalayas protect the country against the cold winds blowing from Siberia through central Asia.
 
2>The Himalayas are the source of major rivers like Ganga, the Indus. the Brahmaputra and their tributries. so they make our land fertile.

3>High mountain ranges and peaks act a barier for enemies and so play a great role in the defence of India. (: