In order for matter to recycle and return in the food chain shown here, what must be present at level A?
A) Producers
B) Decomposers
C) Tertiary consumers
D) Secondary consumers
Decomposers like bacteria and fungi decompose any amount of living and non-living organic matter that is left unconsumed in the ecosystem. They cycle the matter back into the food chain in forms that can be used by producers to make the matter available to the consumers.
