D I am guessing is the most correct.
1) Recognize the signs of danger.
2)Calm things down.
3) Don’t leave the situation.
4) Offer alternatives.
Answer:
The skin
Digestive tract
Vagina
Mucous membrane
Explanation:
The skin prevents microbes from entering the body
Digestive tract e.g. stomach acid is a natural defence mechanism
The vagina is acidic and this prevents harmful bacteria from growing with it's own flora.
Mucous membranes e.g. lining of the mouth, nose, eyelids are all defense mechanisms.
mental health....haha....
