All fungi are multicellular heterotrophs. All fungi are single-celled heterotrophs. All animals are multicellular heterotrophs. All animals are single-celled heterotrophs.
I gave my students this multiple choice question: Which statement is true?

Only one answer is correct among these 4 choices:
- All fungi are multicellular heterotrophs.
- All fungi are single-celled heterotrophs.
- All animals are multicellular heterotrophs.
- All animals are single-celled heterotrophs.

Could you tell me which one is correct?

All animals are multicellular heterotrophs.