In a forest ecosystem, what trophic level are the trees?

A. Heterotroph

B. Primary consumer

C. Autotroph

D. Decomposer

C

Explanation:

Autotroph means it is a producer (most of the time a plant).

Autotroph

Explanation:

i say this because this means

that an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

and tree make there food (leafs) from "the sun water" and (carbon dioxide i would like to say)