D. all of the above
this sounds a lot more like geography than biology by the way
All infectious agents cause sicknesses. Viruses, bacteria, and fungi are the different groups of infectious agents.
Did this help?
Carbon has four electrons in its outer shell, thus it can form four bonds
Answer:
The correct answer is option immune tolerance.
Explanation:
Immune tolerance is the condition in which there is no response to the immune system to molecules, tissues or substances that can induce an immune response.
Body Does not show the immune response to the molecules or substances that is present in the food is an example of immune tolerance. Immunological memory, passive immunity, and secondary immune responses are the response type of immunity but the immune tolerance is not a response.
Thus, the correct answer is option - immune tolerance.