The Outermost Tail Feather of the Male Barn Swallow Is

Multiple Choice

The outermost tail feather of the male barn swallow is longer than that of the female barn swallow. The long tail feather helps the males attract females, but it also requires the males to use extra energy to fly.The long tail feather trait is maintained in the barn swallow populations because, compared to males with a shorter tail feather, males with a longer tail feather are more likely to

A) build a large nest.
B) produce offspring.
C) migrate each winter.
D) escape from predators.