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.

(it's not b)

Water pollution is the result of direct or indirect discharge of pollutants into water bodies without adequate filtration.
From the given options the following are true:
A. Mine wastes and heavy metals become water pollution through storm water runoff.
These mine wastes affect surface water quality and quantity groundwater quality and quantity, soils, air quality, and biota. It is important to estimate the potential environmental effects  and to prevent them.

The answer is A (Mine wastes and heavy metals become water pollution through storm water runoff).

Explanation:

Compound light microscope