Which 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

I think the answer is C. Genetic variation

it has to be c trust me i won’t fail you!

Explanation:because all the chickens have a different color and gives it variation

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

do yall know the answer?