The mechanical advantage of a pulley is...

where’s the list ? the question is incomplete

because growing process had stoped after 4-5 year

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.