How is surface water naturally purified?
A:freezing water destroys impurities

B:evaporation leaves impurities behind

C:sediments precipitate out

D:soil filters the water


Answer :

the correct answer is D.

A is wrong because it does not destroy molecules , they cannot be destroyed.

B is wrong because there can still be impurities from the clouds

C is wrong because sediments cannot be precipitated , only water can