Why can you see an apple as green and not red?

d. air pressure decreases as altitude increases.

attach the statements so i can answer : )

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.