Answer the following question given this paragraph: All ecosystems need a constant input of energy in the form of sunlight or chemical compounds. Living things can be classified based on how they obtain energy as producers, consumers, or decomposers. Q: The energy for an ecosystem can come from sunlight or _________? A:

Select from the following.
(A). radiation compounds
(B). fossil fuels
(C). rain
(D). chemical compounds
The answer is:
(D).