Based on your observations, which factors affect the potential energy of the skateboarder? How do these factors affect the amount of potential energy?
Please help ASAP

d) the number of neutrons plus the number of protons

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.