Fungi can't produce their own energy but instead take in nutrients from their environment. this makes fungi
a. heterotrophs.
b. chemotrophs.
c. mixotrophs.
d. autotrophs

That would be A. heterotrophs

Fungi, like animals, are heterotrophs and get their food from the environment.

Plants, on the other hand, are autotrophs. Autotrophs are organisms that make their own food from photosynthesis or chemosynthesis.