( ( ( ( ( The decomposers ) , ) ( organisms ( like ( ( ( fungi ( -LRB- ( ( mushrooms ( , ( ( toadstools , ) etc. ) ) ) -RRB- ) ) ) and ) bacteria ) ) ) ) , ) ( ( ( ( feed ( on ( dead ( ( plants or ) animals ) ) ) ) and ) ( ( break them ) down ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS decomposers)) (, ,) (NP (NP (NNS organisms)) (PP (IN like) (NP (NP (NP (NNS fungi)) (PRN (-LRB- -LRB-) (NP (NNS mushrooms) (, ,) (NNS toadstools) (, ,) (FW etc.)) (-RRB- -RRB-))) (CC and) (NP (NNS bacteria))))) (, ,)) (VP (VP (VBP feed) (PP (IN on) (NP (JJ dead) (NNS plants) (CC or) (NNS animals)))) (CC and) (VP (VBP break) (NP (PRP them)) (PRT (RP down)))) (. .)))
The decomposers, organisms like fungi (mushrooms, toadstools, etc.) and bacteria, feed on dead plants or animals and break them down.
(ROOT (S (NP (NP (DT A) (NN role)) (PP (IN of) (NP (NP (NNS mushrooms)) (PP (IN in) (NP (NNS ecosystems)))))) (VP (VBZ is) (VP (VBG breaking) (PRT (RP down)) (NP (JJ dead) (NN plant) (NN material)))) (. .)))