( ( ( ( Some ( of ( the ( plant ( and ( animal species ) ) ) ) ) ) ( that ( once ( live here ) ) ) ) ( adapted ( to changes ) ) ) ( , ( others ( ( are extinct ) . ) ) ) )
(ROOT (S (S (NP (NP (DT Some)) (PP (IN of) (NP (DT the) (NN plant) (CC and) (NN animal) (NNS species))) (SBAR (WHNP (WDT that)) (S (ADVP (RB once)) (VP (VBP live) (ADVP (RB here)))))) (VP (VBD adapted) (PP (TO to) (NP (NNS changes))))) (, ,) (NP (NNS others)) (VP (VBP are) (ADJP (JJ extinct))) (. .)))
Some of the plant and animal species that once live here adapted to changes, others are extinct.
(ROOT (S (NP (JJ Environmental) (NNS changes)) (VP (VBZ is) (ADJP (RBS most) (JJ responsible) (PP (IN for) (NP (NP (DT the) (NN extinction)) (PP (IN of) (NP (NP (JJS most) (NNS species)) (PP (IN of) (NP (NNS plants) (CC and) (NNS animals))))) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (VP (VBN lived) (PP (IN on) (NP (NN earth))))))))))) (. .)))
Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.