Answer: Option A."Type 1 Hypersensitivity"
Explanation:
Hypersensitivity reaction can be defined as the reaction produced by normal immune system in response to any foreign substance such as allergies as the protection barrier for body.
Type I hypersensitivity reaction is also known as immediate hypersensitivity reactions that involves immunoglobulin E (IgE)–mediated activation that release histamine or other mediators from basophils and mast cells.
Thus the correct option is A.
The aspect of Robert's health that is directly affected by his lack of contact with others is physical. It is fundamental to achieve overall health.
<h3>Health components and physical health</h3>
Health can be defined as an overall state of wellness, which is associated with physical, mental, and emotional health.
Mental health can be defined as cognitive functions associated with heath.
Emotional health refers to the control of feelings and behaviors.
Physical health is a health component associated with the absence state of physical injuries.
Learn more about physical heath here:
brainly.com/question/1492300
Self control dndhshdhdshsnjsjsjsjsjje