All but one factor contributes to water pollution. That factor is

Aacid rain.
Bmotor oil runoff.

Eliminate

Cozone depletion.
Dfertilizer runoff.

Verified Answer :

Water pollution is the abuse utilization of the bodies of water. There can be a lot of factors that may cause water pollution. From the given choices, C or ozone depletion is not one factor for water pollution. Ozone depletion isĀ another environmental problem that we are encountering today and it causes harmful UV rays to reach the earth which may result to people developing skin cancer and cataracts.

The answer is C. ozone depletion