Abundance of prey can vary locally within a region. ----, whales must be prepared to move constantly in search of the highest food densities. A. Since B. Both C. As D. Thus - Causative Verb | English Grammar Quiz

Abundance of prey can vary locally within a region. —-, whales must be prepared to move constantly in search of the highest food densities.

A. Since
B. Both
C. As
D. Thus

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