Question to you: What do things that cannot make their own food need as a nutrient?\nOptions:\n- (A) Energy\n- (B) metal\n- (C) animals\n- (D) mud\n- (E) Energy.\n- (F) protein\n- (G) prototype\n- (H) fungi.
Let's reason step-by-step:
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Heterotrophs are living things that cannot make their own food. Proteins are an essential nutrient for heterotrophs . Living things that can't make their own food need protein. Final answer: (F).
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