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  3. What caused great migrations of animals and plants? [originaltext]During the pas

What caused great migrations of animals and plants? [originaltext]During the pas

游客2023-12-29  75
问题 What caused great migrations of animals and plants?
During the past 1. 65 million years, there have been four major episodes of global cooling, which resulted in great migrations of animals and plants. Yet, the earth remained.
选项 A、They could not adapt to the changed soil.
B、They could not adapt to the changed air.
C、They could not adapt to the changed water.
D、They could not adapt to the changed climate.
答案 D
解析 根据原文“…there have been four major episodes of global cooling，which resulted in great migrations of animals and plants”，听懂因果关系即可判断造成大量生物迁徙的原因是“全球变冷”，故D是正确选项。
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