A) prevention of invasions
B) valuable source of timber
C) They prevent the monsoons from crossing to the north and also serve as a reservoir of water from which our perennial rivers flow
D) They protect India from the icy cold north winds
A) prevention of invasions
B) valuable source of timber
C) They prevent the monsoons from crossing to the north and also serve as a reservoir of water from which our perennial rivers flow
D) They protect India from the icy cold north winds