The correct answer is option C."Some rabbits living in a forest have short, spotted ears, while others have long white ears".
Explanation:
Natural selection is based on the survival of the fittest, which are the individuals that have advantageous traits over other individuals of the same species. Organisms must have variation within a population in order that the advantageous traits can be selected. One example of this variation is Some rabbits living in a forest have short, spotted ears, while others have long white ears. Either the short, spotted ears or the long white ears would be advantageous for the rabbits in the forest conditions, and it is very likely that one trait will be selected by nature eventually.