Often overlooked, what is the importance of decomposers and detritivores (organisms that eat left overs, not scavengers) in a balanced
ecosystem?

A. They are the largest group at the bottom of an energy pyramid.
B. They are a keystone species in passing the nutrients through the food chain.
C. They help break down dead organic matter and return nutrients to the soil.
D. They can survive without oxygen and thus continue under extreme conditions.