Animal migration is a seasonal or periodic movement of animals in response to changes in c
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Animal migration is a seasonal or periodic movement of animals in response to changes in climate or food ______, or to ensure reproduction.
A.alternation
B.availability
C.utilization
D.capacity
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正确答案:B
解析:(availability可得性,可用性,有效性)。句意为:动物的移栖是指动物为了适应气候或食物可得性的变化,或为了保证繁殖而进行的季节性或周期性的迁徙。A.alternation轮流,交替;C.utilization利用;D.capacity能力,才能。
