Fossil Evidence Suggests That Feathers Existed Prior to the Development

Fossil evidence suggests that feathers existed prior to the development of a flight-capable skeleton; because these feathered animals could not fly,biologists suspect that the initial adaptive value for feathers was related their ability to

A) serve as insulation.
B) reduce an animal's suitability as prey.
C) create an enlarged body contour and discourage predators.
D) accept metabolic waste and reduce the need of water for urine production.

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