2. Vector Arrow C is shorter in the example. What does it mean that the
vector arrow is shorter in the example?

i don't know that i agree with that but what's the question ?

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.

+15-35=-20

going in opposite directions