Which of these limiting factors could cause tree squirrels to lose their homes?

A. a natural disaster

B. an increase in predators

C. an animal disease

D. an increase in competition for food

I would say a natural disaster like a forest fire that could kill trees that are their homes. A forest fire could kill the trees and also the cones they eat for food and thus destroy their habitat and also a source of food and the branches they use to travel from one tree to another in the upper stories of the forest.