( Animals ( ( ( ( ( live ( by ( eating ( ( the energy ) ( produced ( by ( plants ( -LRB- ( herbivores -RRB- ) ) ) ) ) ) ) ) ) , ) or ) ( live ( by ( eating ( animals ( that ( eat ( ( plants ( -LRB- ( carnivores -RRB- ) ) ) ( Let ( 's ( ( ( ( take ( ( the ( human being ) ) ( -LRB- ( ( a ( polyhagous animal ) ) -RRB- ) ) ) ) ( as ( an example ) ) ) and ) ( ponder ( upon it ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Animals)) (VP (VP (VBP live) (PP (IN by) (S (VP (VBG eating) (NP (NP (DT the) (NN energy)) (VP (VBN produced) (PP (IN by) (NP (NP (NNS plants)) (PRN (-LRB- -LRB-) (NP (NNS herbivores)) (-RRB- -RRB-)))))))))) (, ,) (CC or) (VP (VBP live) (PP (IN by) (S (VP (VBG eating) (NP (NP (NNS animals)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (S (NP (NP (NNS plants)) (PRN (-LRB- -LRB-) (NP (NNP carnivores)) (-RRB- -RRB-))) (VP (VB Let) (S (NP (POS 's)) (VP (VP (VB take) (NP (NP (DT the) (JJ human) (NN being)) (PRN (-LRB- -LRB-) (NP (DT a) (JJ polyhagous) (NN animal)) (-RRB- -RRB-))) (PP (IN as) (NP (DT an) (NN example)))) (CC and) (VP (VB ponder) (PP (IN upon) (NP (PRP it))))))))))))))))) (. .)))
Animals live by eating the energy produced by plants (herbivores), or live by eating animals that eat plants (carnivores) Let's take the human being (a polyhagous animal) as an example and ponder upon it.
(ROOT (S (NP (NNS Herbivores)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NNS animals)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (S (NP (NNS producers)) (VP (TO to) (VP (VB get) (NP (NN energy)))))))))))) (. .)))