( ( ( ( ( ( ( ( ( Food ( and ( habitat availability ) ) ) , ) reproduction ) , ) ( environmental cycles ) ) , ) and ) ( temperature change ) ) ( ( may ( be ( causes ( of ( migration ( for ( some species ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Food) (CC and) (NN habitat) (NN availability)) (, ,) (NP (NN reproduction)) (, ,) (NP (JJ environmental) (NNS cycles)) (, ,) (CC and) (NP (NN temperature) (NN change))) (VP (MD may) (VP (VB be) (NP (NP (NNS causes)) (PP (IN of) (NP (NP (NN migration)) (PP (IN for) (NP (DT some) (NN species)))))))) (. .)))
Food and habitat availability, reproduction, environmental cycles, and temperature change may be causes of migration for some species.
(ROOT (S (NP (NP (DT A) (NN change)) (PP (IN of) (NP (NP (NN season)) (CC and) (NP (JJR less) (NN food))))) (ADVP (RB usually)) (VP (VB cause) (S (NP (JJ certain) (NNS animals)) (VP (TO to) (VP (VB migrate))))) (. .)))
A change of season and less food usually cause certain animals to migrate.