Answer:
The correct answer is D. A and B only
Explanation:
Stress can be both positive and negative depending upon the situation or circumstances. For example, upcoming pregnancy, holiday, or wedding comes under positive stress.
In negative stress which is also called distress persons feel anxiety because he is not able to cope up with the situation. It can lead to depression.
In stress, our sympathetic nervous system which is a part of the autonomic nervous system contributes to initiate a physical response called fight and flight response in the body to cope up with stress. Therefore the correct answer is D.
Answer: B. a young athlete.
Explanation: A pathogen is not going to want to live in a healthy host they will want to be in a host who is more susceptible to diseases. Like an older person, a smoker, or a sick person, etc. So, it would be LEAST effective if a host lived in a young athlete.
Hope this helps.
