Which best illustrates a result of natural selection?

a bat that is born with a wing that is missing the web

dark-colored hares living in a snowy area

mosquitoes that transmit disease to humans

giraffes having increasingly longer necks over time

Giraffes having increasingly longer necks over time. According to Charles Darwin, the long neck of the giraffes came about as a result of long-term natural selection which favoured the survival of giraffes that had long necks instead of those with short necks. The long necks allowed the giraffes to forage for food from tall trees especially in the event that food on the ground became scarce. Since the longer neck giraffes were able to reach food in areas that their short neck counterparts were unable to, this means that the population of short-neck giraffes was naturally reduced, thus leaving long-neck giraffes to breed even more.

The answer is that giraffe having longer necks. The procedure by which life forms that are more qualified to their condition than others create all the more posterity. Therefore of common choice, the extent of living beings in an animal categories with qualities that are versatile to a given situation increments with every era.