Which of the following is true concerning sources of water pollution?
a. mine wastes and heavy metals become water pollution through storm water runoff.
b. biodegradable materials like food, wood, and leaves are not considered pollution.
c. petroleum byproducts and fuels end up as pollution principally from oil spills.
d. pesticides and herbicides do not commonly become water pollutants.

The correct answer is B. Biodegradable materials like food, leaves, and wood are not considered pollution.

Some of the causes of water pollution may include; Direct sources or indirect contaminant sources. Examples of direct sources include waste treatment plants, refineries, and effluent outfalls from factories.
This emits fluid which has various qualities directly into the urban water supply. Indirect contaminant they enter the water supply from soils or in groundwater systems and atmosphere through rainwater. 
Some effects of water pollution can be; poisonous food animals, poisonous drinking water deforestation from acid rain. A good way to decrease this problem of water pollution is by acting responsibly with household chemicals and where to dispose of them.