What is carrying capacity and WHY is it important for us to know about? Is it good or bad to be over capacity and
why

Carrying capacity shows how much you can carry, over being more than what you can carry and under being less than you can carry. It is bad to be over capacity because you would be carrying more than you are physically able to.

it's c. (to reduce the greenhouse effect/carbon gasses)

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands