( Decomposers ( ( ( ( ( break down ) ( dead organisms ) ) , ) ( ( ( returning nutrients ) ( to ( the soil ) ) ) ( so ( they ( can ( be ( used ( by plants ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Decomposers)) (VP (VBP break) (PRT (RP down)) (NP (JJ dead) (NNS organisms)) (, ,) (S (VP (VBG returning) (NP (NNS nutrients)) (PP (TO to) (NP (DT the) (NN soil))) (SBAR (IN so) (S (NP (PRP they)) (VP (MD can) (VP (VB be) (VP (VBN used) (PP (IN by) (NP (NNS plants))))))))))) (. .)))
Decomposers break down dead organisms, returning nutrients to the soil so they can be used by plants.
(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.