The correct option is this: THE ENTIRE POPULATION WOULD BECOME WHITE.
According to previous reports, majority of the animals living at White Sand National Monument in New Mexico are white in color thus matching the white sand on which they live. For most of these animals, their counter parts which live in other habitats are not white in color. Scientists believe that the white coloration of these animals is due to natural selection.
For instance, the eastern fence lizard is brown in color, lets consider a brown colored lizard that is newly moving into the white sand habitat. When this lizard reproduces, its babies will probably have slightly different colors; the babies with lighter colors will blend in more easily with the white sand, thus escaping predators. These lighter colored babies will grow up to reproduce their own babies, which share the lighter coloration of their parents. After many generations of selection for light coloration genes, the population will eventually become white.
