Science follows the evidence where it leads, and pseudoscience starts with the conclusion, and works backwards to confirm it
Answer:
a biological community of interacting organisms and their physical environment.
Explanation:
Carbon is an important component in living things as it is present in the food of living things in the form of saccharides such as glucose and polysaccarhides such as starch. Hence the answer to this problem should have to be A. Carbon is a source of energy.
Prokaryotes don't have a nucleus so it's bacteria :)
