Fact 1: Natural disasters can cause animals to leave an environment.

Fact 2: Mammals are a class of animal.

Given the two facts above, answer the question "What may cause mammals to leave an enviroment?" with the following options: 
- contamination
 - adequate shelter
 - lack of predators
 - influenza
 - Pollution
 - deforestation
 - natural disasters
 - an abundance of food


 

       natural disasters  