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
Think hard. Detailed solution:
(F)
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.

.

So, the final answer is (F)