Question

Which of the following is an example of natural selection?

Answer 1

A Cricket Frogs prefer to sleep during the day, while Red-eyed Tree Frogs prefer to sleep during the night.
B Pesticides are sprayed in a field, resulting in an increase in crop growth and a decrease in insect population.
C Rabbits with a mutation for longer, thicker fur survive an unusually cold winter, while many normal rabbits do not survive.

Answer 2

http://en.wikipedia.org/wiki/Natural_selection
http://simple.wikipedia.org/wiki/Natural_selection

Answer 3

Natural selection occurs when some individuals of a species are better suited to survive in an environment than others. So more of them do survive, they have better reproductive success, are more likely to pass on the genes that helped them survive to their offspring - and the species evolves that direction.

So think about the option that involves some members of the population being better able to survive than others.