The correct option is D.
Why are some birds' feathers so colorful?
They are used to attract possible mates. Colors and patterns help birds identify their own species. Colors can help birds hide from predators by camouflaging them. Colors are used to attract attention when courting (ie: courtship displays).
Why do male birds have bright colors?
The colorful plumage of males allows birds within the species to recognize each other. It also allows predators outside the species to recognize birds that are not safe to eat. Dull feathers protect female birds.
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