Design an experiment and identify the independent variable, the dependent variable, the control group, and two constants.

b is the correct answer

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

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.