A population of black and white snails reside in an area. There is a predator bird which preys on both black and white snails. The white snail population increases because:

The correct answer is: The white snail escapes from predators due to the white background.

In this example, since the population of white snails is outnumbering the population of black snails, it is evident that natural selection favors white snails. Hence, out of all the options, the correct answer is that the number of white snails is proliferating because they are able to reproduce quickly.