( ( Animal migration ) ( ( ( ( is ( ( the ( relatively ( long-distance movement ) ) ) ( of individuals ) ) ) , ) ( usually ( on ( a ( seasonal basis ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Animal) (NNP migration)) (VP (VBZ is) (NP (NP (DT the) (RB relatively) (JJ long-distance) (NN movement)) (PP (IN of) (NP (NNS individuals)))) (, ,) (PP (ADVP (RB usually)) (IN on) (NP (DT a) (JJ seasonal) (NN basis)))) (. .)))
Animal migration is the relatively long-distance movement of individuals, usually on a seasonal basis.
(ROOT (S (NP (NNP Migration)) (VP (VBZ is) (NP (NP (DT an) (NN evolved)) (, ,) (VP (VBN adapted) (NP (NN response)) (PP (TO to) (NP (NP (NN resource) (NN availability)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (NP (NP (DT the) (JJ long-range) (JJ seasonal) (NN movement)) (PP (IN of) (NP (NNS animals)))))))))))) (. .)))