ICSE Class 9 Answered

Factors that determine the amount of rainfall are:

Direction of Winds: Winds blowing from oceans to land bring in more rainfall than the winds that blow from lands.

Land-Sea Contrasts: Coastal areas experience more rainfall than places located in the interiors of the continents. This is because the oceans are a source of water vapour.

Mountains: When winds full of moisture, strike against the mountains, they are forced to give rainfall to the windward side. The leeward side of the mountains however, does not receive rainfall and mostly remain dry.