The chemicals that are released from the hypothalamus, the gonads, and the adrenal cortex are called , whereas the chemicals released by bioelectrical impulses throughout the brain are called .

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.