Question

water pollution occurs when ______ are released into the water supply.
a. fish
b. toxins
c. small stones
d. ultraviolet rays
please select the best answer from the choices provided
a
b
c
d

Explanation:

Water pollution is defined as the contamination of water bodies by harmful substances. Toxins are harmful chemicals/substances that, when released into water, degrade water quality, fitting the definition of water pollution. Fish are aquatic organisms, small stones are inert, and ultraviolet rays are a form of radiation not typically "released into water supplies" to cause pollution. Thus, toxins are the correct answer.

Answer:

B. toxins