Acertain species of butterfly varies in color from white to dark blue. the birds found in the same area feed on the white or lightly colored butterflies, leaving butterflies that are darkly colored. this may result in what type of selection?

Directional selections

Explanation:

Directional selections occur when a certain phenotype is favored by the environment, reproductive preferences or other situations that favor a certain characteristic make the dna of a certain species to shift into that direction, in this case the lighter coloured butterflies are eaten by the birds, so eventually more and more dark butterflies will start to born because of this.

pregnancy happens more and more

your spelling is a little off : ]