What do ecosystems in nature need an influx of to remain feasible?\nOptions:\n- (A) Continuous nuclear energy.\n- (B) Natural lipids and proteins.\n- (C) Energy.\n- (D) rain\n- (E) water\n- (F) Energy\n- (G) oxygen\n- (H) Renewable Sunny Delight.
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
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Energy enters ecosystems in the form of sunlight or chemical compounds. Sunlight is the source of light in nature. Nature is comprised of many ecosystems which all depend upon energy. The answer: (C).
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