Answer:
The answer is the Immune system (a).
Explanation:
The immune system consists of agents that help your body fight against pathogens and other invading substances. It has your white blood cells, enzymes, mucus, hydrochloric acid (in your stomach), and even your saliva. All these substances help make sure your body is rid of anything that may bring harm to you!
This is very very easy its oubvously A.you are pain free
The answer is D, tuberculosis.
Asthma is caused by inflammation of the airways, allergies are caused by an immunoreaction to a substance, and the flu is a viral infection.
Answer: 24 hours after diarrhea and vomiting have stopped
Explanation: