According to newton's first law of motion for every action there is an equal and opposite reaction? true or false

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.

the rearrangement of particles in a physical change. hope this