When humans are in love why do we check out other people?

Humans are weird. we'll never know

Explanation:

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.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.