Fact 1: Having no natural predators increases population size.

Fact 2: Population size is the predictor of extinction probability.

Given the two facts above, answer the question "What event does the lack of natural predators prevent?" with the following options: 
- extinction
 - Animal survival
 - deforestation
 - proliferation
 - movement
 - population explosion
 - competition
 - increasing population


 

 extinction        