( ( ( ( ( ( ( The roots ) ( of ( the trees ) ) ) ( then ( ( ( intermingle ( with ( ( the root ) ( of ( the bushes ) ) ) ) ) , ) ( ( taking up ) ( ( ( more and ) more ) ( of ( ( ( the space ) and ) ( the ( soil nutrients ) ) ) ) ) ) ) ) ) , ) and ) ( ( ( the leaves ) ( of ( the trees ) ) ) ( ( ( catch ( the sunlight ) ) , ) ( ( leaving ( ( ( less and ) less ) sunlight ) ) ( for ( the ( ( lower growing ) bushes ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NNS roots)) (PP (IN of) (NP (DT the) (NNS trees)))) (VP (ADVP (RB then)) (VBP intermingle) (PP (IN with) (NP (NP (DT the) (NN root)) (PP (IN of) (NP (DT the) (NX (NNS bushes)))))) (, ,) (S (VP (VBG taking) (PRT (RP up)) (NP (NP (JJR more) (CC and) (JJR more)) (PP (IN of) (NP (NP (DT the) (NN space)) (CC and) (NP (DT the) (NN soil) (NNS nutrients))))))))) (, ,) (CC and) (S (NP (NP (DT the) (NNS leaves)) (PP (IN of) (NP (DT the) (NNS trees)))) (VP (VBP catch) (NP (DT the) (NN sunlight)) (, ,) (S (VP (VBG leaving) (NP (ADJP (JJR less) (CC and) (JJR less)) (NN sunlight)) (PP (IN for) (NP (DT the) (ADJP (JJR lower) (VBG growing)) (NN bushes))))))) (. .)))
The roots of the trees then intermingle with the root of the bushes, taking up more and more of the space and the soil nutrients, and the leaves of the trees catch the sunlight, leaving less and less sunlight for the lower growing bushes.
(ROOT (S (NP (NNP Gravitropism)) (VP (VBZ ensures) (SBAR (SBAR (IN that) (S (NP (NNS roots)) (VP (VBP grow) (PP (IN into) (NP (DT the) (NN soil)))))) (CC and) (SBAR (IN that) (S (NP (NNS shoots)) (VP (VBP grow) (PP (IN toward) (NP (NN sunlight)))))))) (. .)))