Play a vital role in recycling nutrients and creating a balance of earth's materials. producers, consumers, decomposers

Decomposers

Decomposers are the organisms which are responsible for consuming decaying organisms which have died of either natural or accidental causes. Some decomposers are worms, mushrooms and etc. 
Producers in the other hand process sunlight for energy and consumers feed on the producers or the consumers themselves. 

D. pray lands grasslands swamps