Which of the following is a physiological adaptation?
a. group hunting
b. hyoid bone adapted for roaring
c. dark coloration
d. migration

The right option is b. hyoid bone adapted for roaring

A physiological adaptation is the adjustment and the regulation of an organism’s internal body functions in order to cope with its changing environment. A physiological adaptation is also an organism’s response to a certain external stimulus in order to maintain homeostasis. Hyoid bone adapted for roaring and the production of venom by snakes to avoid predators are examples of physiological adaptation.

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