Lazuli buntings are birds found in the western part of the United States. The male birds have feathers with colors that range from brown to bright blue. The brightest blue and the
dullest brown males are more likely to win mates than males with bluish brown feathers.
Which graph represents how selective pressures will act upon male Lazuli Bunting
feather coloration? The dotted line represents the original population, and the solid
line represents the population after selection.