( There ( ( are ( ( many ( , ( many types ) ) ) ( of ( decomposers ( that ( ( ( take ( dead ( ( plants and ) animals ) ) ) and ) ( ( ( ( break them ) down ) ( into ( nutrients ( in ( the soil ) ) ) ) ) ( so ( that ( plants ( can ( use ( them ( to grow ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (JJ many) (, ,) (JJ many) (NNS types)) (PP (IN of) (NP (NP (NNS decomposers)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP take) (NP (JJ dead) (NNS plants) (CC and) (NNS animals))) (CC and) (VP (VBP break) (NP (PRP them)) (PRT (RP down)) (PP (IN into) (NP (NP (NNS nutrients)) (PP (IN in) (NP (DT the) (NN soil))))) (SBAR (RB so) (IN that) (S (NP (NNS plants)) (VP (MD can) (VP (VB use) (S (NP (PRP them)) (VP (TO to) (VP (VB grow)))))))))))))))) (. .)))
There are many, many types of decomposers that take dead plants and animals and break them down into nutrients in the soil so that plants can use them to grow.
(ROOT (S (PP (IN In) (NP (DT a) (NN forest))) (, ,) (NP (NNS decomposers)) (VP (VBP help) (SBAR (S (NP (JJ other) (NNS organisms)) (VP (VBP survive) (SBAR (S (PP (IN because) (NP (PRP they))) (NP (PRP they)) (VP (VBD put) (NP (NNS nutrients)) (PP (IN into) (NP (DT the) (NN soil))) (SBAR (IN that) (S (NP (NNS plants)) (VP (VBP use) (S (VP (TO to) (VP (VB grow)))))))))))))) (. .)))
In a forest, decomposers help other organisms survive because they they put nutrients into the soil that plants use to grow.