( ( 5 . ) ( ( Explain ( ( ( how ( energy ( flows ( through ecosystems ) ) ) ) and ) ( why ( ( the energy ) ( transfer ( at ( ( each ( trophic ( level results ) ) ) ( in ( ( a loss ) ( of energy ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD 5) (. .)) (VP (VBZ Explain) (SBAR (SBAR (WHADVP (WRB how)) (S (NP (NN energy)) (VP (VBZ flows) (PP (IN through) (NP (NNS ecosystems)))))) (CC and) (SBAR (WHADVP (WRB why)) (S (NP (DT the) (NN energy)) (VP (VB transfer) (PP (IN at) (NP (NP (DT each) (JJ trophic) (NN level) (NNS results)) (PP (IN in) (NP (NP (DT a) (NN loss)) (PP (IN of) (NP (NN energy)))))))))))) (. .)))
5. Explain how energy flows through ecosystems and why the energy transfer at each trophic level results in a loss of energy.
(ROOT (S (NP (NN Pyramid) (NN ecosystem)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB show) (NP (NN energy) (NN flow)) (PP (IN through) (NP (DT the) (JJ trophic) (NNS levels)))))))) (. .)))
Pyramid ecosystem is used to show energy flow through the trophic levels.