Which of These Organisms are Not Heterotrophs

Question

Which of these organisms are not heterotrophs?
A) Chemosynthetic archaea synthesizing carbohydrates
B) Bacteria consuming dissolved organic compounds
C) Parasitic protozoa living in the gut of a pig
D) Fungi feeding on soil detritus

Accepted Answer

Chemosynthetic archaea are autotrophs because they synthesize their own food using chemical energy, unlike heterotrophs that rely on consuming other organisms for energy.