How do the earth and the moon orbit the sun?

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

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.