Answer:
Stress sensitization
Step-by-step explanation:
Substances which are capable of inciting reaction, that is the response of the immune system when fed with a foreign or substances which the body isn't used to. This means that the body responds to an unwanted or strange substance which he doesn't want, that is an allergic reaction. This can be related to how an individual especially a child which has been exposed to series of childhood adversity, that is a difficult or unpleasant situation or condition over the cause ofnhis/her life will react to stress (that is the immune system treats stress like a foreign exposure) which the body doesn't yield to.