Question

question 3 of 20 :
select the best answer for the question.

1. all animals are

a. autotrophs.

b. polytrophs.

c. heterotrophs.

d. biotrophs.

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Explanation:

To solve this, we analyze each option:

• Option A: Autotrophs produce their own food (e.g., plants via photosynthesis). Animals don't do this, so A is incorrect.
• Option B: "Polytrophs" is not a standard term for animal nutrition, so B is incorrect.
• Option C: Heterotrophs obtain food by consuming other organisms. All animals rely on external food sources (either plants, animals, or both), so they are heterotrophs. This is correct.
• Option D: "Biotrophs" typically refers to parasites that depend on living hosts, but not all animals are parasites, so D is incorrect.

Answer:

C. heterotrophs.