( ( When ( ( these animals ) ( eat ( these ( plant products ) ) ) ) ) ( , ( ( food ( energy ( and ( organic compounds ) ) ) ) ( ( are ( ( transferred ( from ( the plants ) ) ) ( to ( the animals ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT these) (NNS animals)) (VP (VBP eat) (NP (DT these) (NN plant) (NNS products))))) (, ,) (NP (NN food) (NN energy) (CC and) (JJ organic) (NNS compounds)) (VP (VBP are) (VP (VBN transferred) (PP (IN from) (NP (DT the) (NNS plants))) (PP (TO to) (NP (DT the) (NNS animals))))) (. .)))
When these      animals eat these plant products, food energy and organic compounds are transferred      from the plants to the animals.
(ROOT (S (NP (NNS Animals)) (VP (VBP need) (NP (NP (NNS plants)) (PP (IN for) (NP (NN food) (CC and) (NN energy))))) (. .)))