What type of growth does a plant exhibit when its trunk gets thicker?.

multiply it by 5 in order for you to understand i cant give an exact answer.

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.