Gravitational pull is determined volume and density mass and distance acceleration and volume the sun and the stars

  mass and distance

Explanation:

Gravitational force is directly proportional to mass and inversely proportional to the square of distance. It is determined by mass and distance.

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.