( Plants ( ( depend ( on ( sunlight ( for ( ( energy , ) ( which ( ( is ultimately ) ( converted ( into ( ( essential nutrients ) ( for ( ( all ( the consumers ) ) ( in ( food ( ( chains and ) webs ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Plants)) (VP (VBP depend) (PP (IN on) (NP (NP (NN sunlight)) (PP (IN for) (NP (NP (NN energy)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB ultimately)) (VP (VBN converted) (PP (IN into) (NP (NP (JJ essential) (NNS nutrients)) (PP (IN for) (NP (NP (PDT all) (DT the) (NNS consumers)) (PP (IN in) (NP (NN food) (NNS chains) (CC and) (NNS webs)))))))))))))))) (. .)))
Plants depend on sunlight for energy, which is ultimately converted into essential nutrients for all the consumers in food chains and webs.
(ROOT (S (NP (NNP Sunlight)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN source)) (PP (IN of) (NP (NP (NN energy)) (PP (IN for) (NP (NP (DT all)) (PP (IN of) (NP (NP (DT the) (NNS organisms)) (PP (IN in) (NP (JJS most) (NN food) (NNS chains))))))))))) (. .)))
Sunlight is the main source of energy for all of the organisms in most food chains.