托福TPO 8 听力Lecture第1篇第5题_According to the professor, why did some blackcaps choose a secondary habitat?

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题目

According to the professor, why did some blackcaps choose a secondary habitat?

They were following a moving food supply.

Their preferred habitat was taken over by another bird species.

Their nesting sites were disturbed by human activity.

Their preferred habitat became too competitive.

题目解析

根据教授所说内容 “So the results of the study suggest that when the number of the competitors in the prime habitat reaches a certain point, the second rank habitat becomes just as successful as the prime habitat.” 可知，有研究结果显示，当主栖息地的竞争者达到一定数量后，blackcaps 就会选择第二栖息地。所以选项 D 正确。

答案: D

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