Which factor does not affect the quality of water?
A.Chemical pesticides used in agricultural fields
B.The untreated sewage waste water mingling in the rivers and lakes.
C.The fresh water without any contamination obtained from pure rainfall and glaciers.
D.Industrial effluents mixing in the rivers and lakes
The answer is C because all of the other answers add unwanted things to the water, we don’t want anything to affect it so the uncontaminated water is the best way to go