What is the role of the fungus in the food web shown?

What is the role of the fungus in the food web shown? boa constrictor beetle coati poison dart frog sloth- strangler fig – fungus fruit bat

A. To gather green light in order to carry out photosynthesis

B. To break down organic matter into carbon dioxide and water

C. To break down food molecules in the absence of oxygen

D. To convert light energy into chemical energy organisms can use