Question

what will happen if mountains are not present in northern part?

Answer 1

If mountains are not present in the northern part we would not get sufficient rain as it resist the clouds to go out from our region,once it enters.

Answer 2

mountains present in northern  part  \the great indian plain would suffer fromcold winds of central Asia during winter.there reason for summer rains and monsoon type of climate in regions beyond western ghats with out it this region would remain drier.