I don't understand its not my language I would like to help but I can't
There are five major types of infectious agents: bacteria, viruses, fungi, protozoa, and helminths. In addition, a new class of infectious agents, the prions, has recently been recognized
The answer would be A because a smaller population would die out faster. The best answer is A because they are more diverse which mean everyone is least likely to get the disease.
Insulin (secreted from the pancreas)
Oversecretion: hypoglycemia (low level of sugar in the blood)
Undersecreation: hyperglycemia (high level of sugar in blood, Diabetes Mellitus)