Question

why do coastal areas receive more rainfall

Answer 1

Answer:

Coasts receive more rainfall as the humidity in the clouds is high when they are at the coast. When they come inside the lands, they have already shed some water in the form of rains, so they rain less in the central lands, or interior of the continent.

This happens as the monsoon rains arrive from the ocean towards the lands. So clouds come from the ocean onto the lands.