The earth rotates on its axis every and revolves around the sun every
a. day . . year
b. month . . day
c. year . . month
d. year . . day

graph question answered .. you think better when you are relaxed and happy

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.