Question

give any two reasons why precipitation is called primary source of water on earth

Answer 1

Precipitation causes rains. The rainwater flow into rivers that are one of the primary sources of water. Rainwater made available by precipitation seeps into ground creating groundwater reserves.

Answer 2

becoz in precepitation we get water in form of hail ,snow etc
and this is called primary becoz, firstlly, it us in solid state which mrlts and joing the moving river,

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