Part II: ClozeIntroducing a non-native species to an environment can cause species endangerment. A native species is _38_ develops naturallyin a particular area and has done so for a long time. A non-native species might be _39_ a new environment by humans, eitherintentionally or by accident. The brown tree snake, _40_ brought by cargo ships stopping at Guam, has managed to kill off 10 of the11 species of birds _41_ the island‟s forests. In Florida, large pet snakes such as the anaconda and the python have been released intothe large Everglades swamp. The snakes _42_ in their new environment, and now compete with and may soon overwhelm theswamp‟s alligators.
38.
(A) one that
(B) the biology that
(C) a living type
(D) those which