The largest number of cells in division are found in the skin. This is because these cells are the ones that are most exposed so they die and are replaced constantly. In addition, it is the most extensive organ of the body and its shape or density varies from one area to another.
I hope my answer can help you.
Temperature is a factor that alters the characteristics of the animals in terms of movements and others. in this case, rabbits that live in temperate forests usually live underground to minimize exposure to harsh sun. This changes the way they acquire food, mate and live in general.
The answer is D: A gradual change in a species over time.