Answer:
5. All of the above.
Explanation:
A variable is any characteristics, number, or quantity that can be measured or counted.
Cultural practices contributes the most to environmental pollution because <span>by making a fire produces the smoke which pollutes the air , that how culture practices contribute to air pollution.</span>
Explanation:
they all are microorganisms and are different kind of category....
Answer:
I believe it is A...............