( ( most ( of ( ( the energy ) ( in ( a ( trophic level ) ) ) ) ) ) ( ( is ( lost ( as ( it ( passes ( to ( the ( next ( higher level ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (PP (IN in) (NP (DT a) (JJ trophic) (NN level)))))) (VP (VBZ is) (VP (VBN lost) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ passes) (PP (TO to) (NP (DT the) (JJ next) (JJR higher) (NN level)))))))) (. .)))
most of the energy in a trophic level is lost as it passes to the next higher level.
(ROOT (S (SBAR (IN As) (S (NP (PRP it)) (VP (VBZ passes) (PP (TO to) (NP (NP (DT the) (JJ next) (NN level)) (, ,) (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (PP (IN in) (NP (DT a) (JJ trophic) (NN level))))))))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN lost))) (. .)))