Decomposers are life forms such as bacteria, fungi, and other microorganisms that break down the remains of other organisms, and thus return nutrients to 
(Decomposers; are; life forms such as bacteria, fungi, and other microorganisms) (other microorganisms; break down; the remains of other organisms)
Decomposers other microorganisms
are break down
life forms such as bacteria, fungi, and other microorganisms
the remains of other organisms