( ( ( The ( ultimate source ) ) ( of ( energy ( for ( ( most living ) organisms ) ) ) ) ) ( ( is ( the sun ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ ultimate) (NN source)) (PP (IN of) (NP (NP (NN energy)) (PP (IN for) (NP (ADJP (RBS most) (JJ living)) (NNS organisms)))))) (VP (VBZ is) (NP (DT the) (NN sun))) (. .)))
The ultimate source of energy for most living organisms is the sun.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (VP (VBN used) (PP (IN by) (NP (VBG living) (NNS things))))))) (VP (VBZ comes) (ADVP (CC either) (RB directly) (CC or) (RB indirectly)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))
Most of the energy used by living things comes either directly or indirectly from the sun.