Migration enables many animals to take advantage of favorable weather and abundant food supplies in areas with changing （）．
A.正确答案Cspecies
B.chances
C.environments
D.factors
Migration enables many animals to take advantage of favorable weather and abundant food supplies in areas with changing （）．
Migration enables many animals to take advantage of favorable weather and abundant food supplies in areas with changing （）．
A.正确答案Cspecies
B.chances
C.environments
D.factors
