The removal of coral, either for

The removal of coral, either for souvenirs collected by the public or for commercial sale by tourist enterprises,_________ some coastal regions of Australia and elsewhere.
A、develops
B、threatens
C、promotes
D、improves
【正确答案】：B
【题目解析】：(P204~205)在澳大利亚沿海及其他地区，公众收集珊瑚当作纪念物或者是旅游企业为商业目的而收集珊瑚，都在威胁着该地区。