<span>The reasons why communicable diseases such as pneumonia is fatal to more people in the past than it is at present include continuing medical advances, improved living conditions, and better preventive treatment. From the given choices, slower population growth is excluded. Thus, the answer should be letter B. </span>
Refusal Strategy is the correct answer!
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.
Concentration
The specific gravity of a urine sample is a reflection of its concentration.