( It ( ( plays ( ( a ( crucial role ) ) ( in ( ( ( the ( fluid balance ) ) , ) ( ( the mechanism ) ( ( by which ) ( cells ( are ( ( nourished and ) cleansed ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ plays) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NP (DT the) (JJ fluid) (NN balance)) (, ,) (NP (NP (DT the) (NN mechanism)) (SBAR (WHPP (IN by) (WHNP (WDT which))) (S (NP (NNS cells)) (VP (VBP are) (VP (VBN nourished) (CC and) (VBN cleansed)))))))))) (. .)))
It plays a crucial role in the fluid balance, the mechanism by which cells are nourished and cleansed.
(ROOT (S (NP (NNP Beneficial) (NNS fungi)) (VP (VBP play) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NP (NN balance)) (PP (IN of) (NP (NNS ecosystems))))))) (. .)))
Beneficial fungi play a crucial role in balance of ecosystems.