The adaptation that allows some of these animals to run fast would be an example of natural selection if it helps them —

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.

what exactly is the question lol

the answer is definitely 36.

hope this : )