I believe the answer would be C. Hope that helped!! :)
Sustain a regular routine of exercise for 30-60 minutes with minimal fatigue
Alveoli small balloon-like structures which are responsible for the oxygen exchange in the lungs across the membranes. These are attached to the branches of the bronchial passages. These alveoli inflate and deflate with inhalation and exhalation. Answer is C.
Answer:
By the end of 1984, there had been 7,699 AIDS cases and 3,665 AIDS deaths in the United States
Explanation:
You should comfort him, and ask him what's wrong. Treat him like any other person and try to find a solution to his problem. Be there for him so it makes him happy again :)
