Question

Which environmental factor would likely lead to an increase in genetic variation in a population of squirrels?
an increase in predators
an increase in available food
an increase in forest fires
an increase in pollution

Answer 1

It would be d

Answer 2

Increase in predators would mean that the population of prey would decrease so the variation would decrease.

Forest fires would also reduce squirrel population, as well as maybe pollution.

The point is, an increase in food is the only one that would increase the population, increase in population means increase in genetic variation.