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

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 is 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.

Factories. Factories make pollution because they dump things into the bodies of water.