The diagram shows part of a roller-coaster ride. At which of the positions shown will the roller-coaster car have the greatest amount of energy in its kinetic energy store?

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.