According to Freud, the part of the mind that is governed by the pleasure 2 points principle is the
O id
.
superego
ego
collective unconscious

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 answer should be in the picture.

its lower due to the doppler effect.: apex