To reduce the energetic cost of thermoregulation, a shrew could remain in its burrow instead of foraging on the surface; however, this behavior would impose an opportunity cost.
a. true
b. false
Ans: a. true
(Shrews that remain in a burrow would avoid the cool air that causes convective heat loss; however, these shrews would miss opportunities to forage for food or conduct other activities while in the burrow.)
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