A. extinction 

Chọn đáp án A

- extinction /ɪkˈstɪŋkʃn/ (n): sự tuyệt chủng

E.g: Many species are threatened with extinction.

- exhibit /ɪɡˈzɪbɪt/ (v): triển lãm

E.g: They have exhibited many of her works at their gallery recently.

- exhaustion /ɪɡˈzɔːstʃən/ (n): sự mệt nhoài, tình trạng kiệt sức

E.g: He felt ill with exhaustion.

- exist /ɪɡˈzɪst/ (v): tồn tại

E.g: Slavery still exists in this country