Answer:
Sender: This is the person that is delivering a message to a recipient. ... Receiver: The receiver is the person who is getting or receiving the message. Feedback: In some instances, the receiver might have feedback or a response for the sender. This starts an interaction.
Explanation:
Make sure to paraphrase this.
Pituitary hormones control your sleep and wake up cycle and I think it affects the brain
It sounds like Nick is suffering from a infection of some sort. The name of this infection he may be suffering from is onychomycosis.
I believe it is B. Because during vigorous exercise, the heart rate and depth of breathing increases to supply muscles with more oxygen.