Answer:
deforstation
Explanation:
deforestation can affect competition of food for example when we cut plants for different purposes the animals that eat the plants will starved and die in this cause if want to eat animals products we could not get because animals are died because of the deforestation this cause food competition between human and animals
I would think it would be false considering part of the virus you are trying to get immunity to is in a vaccine
Lack of predators.
An abundance of Food.
