( ( A ( food chain ) ) ( ( shows ( how ( ( ( energy and ) matter ) ( ( flow ( from producers ) ) ( to consumers ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN food) (NN chain)) (VP (VBZ shows) (SBAR (WHADVP (WRB how)) (S (NP (NN energy) (CC and) (NN matter)) (VP (VBP flow) (PP (IN from) (NP (NNS producers))) (PP (TO to) (NP (NNS consumers))))))) (. .)))
A food chain shows how energy and matter flow from producers to consumers.
(ROOT (S (NP (NNP Food) (NNS chains)) (VP (VBP carry) (NP (NN energy)) (PP (IN from) (NP (NP (NNS producers)) (PP (TO to) (NP (NNS consumers)))))) (. .)))