I'll give you a question, please answer with step-by-step reasoning process.
Energy enters what in the form of sunlight or chemical compounds.\nOptions:\n- (A) biomes\n- (B) fire\n- (C) light\n- (D) Energy.\n- (E) Energy\n- (F) LEDs\n- (G) propagate\n- (H) photons

(A)
Energy enters ecosystems in the form of sunlight or chemical compounds.

Biomes are global ecosystems.

Energy enters biomes in the form of sunlight or chemical compounds.

.

So, the answer is (A)