15. ______ is a survival strategy for animals to conserve energy when conditions are extremely harsh.
(A)Dissolution
(B) Hibernation
(C) Termination
(D)Resurrection
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統計: A(9), B(36), C(8), D(20), E(0) #934323
統計: A(9), B(36), C(8), D(20), E(0) #934323