How do we know how much energy an ecosystem needs?

All ecosystems require energy from an external source – this is usually the sun. ... The living organisms in an ecosystem can be described as producers, consumers and decomposers. Producers are the green plants, which make their own food through photosynthesis.

c is the answer to this question. altitude affects the weather because air molecules evaporate.

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.