( ( ( The energy ) ( from ( the sun ) ) ) ( ( is ( produced ( by fusion ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (VP (VBZ is) (VP (VBN produced) (PP (IN by) (NP (NN fusion))))) (. .)))
The energy from the sun is produced by fusion.
(ROOT (S (NP (NP (NNS Producers)) (PP (IN in) (NP (DT an) (NN ecosystem)))) (ADVP (RB generally)) (VP (VB get) (NP (PRP$ their) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))