Question

hich term best describes the difference in colors of the birds below?

4 birds are shown. One has light brown feathers with darker wings. One has very dark feathers with lighter wings. Another has medium brown feathers with light wings. The last one has medium brown feathers with very dark wings.
natural selection
reproductive maturity
genetic variation
genetic drift

Answer 1

genetic variation

These birds show different color phenotypes among individuals — a variation in traits that arises from differences in their genes (and possibly environmental effects).