Fact 1: Competition may cause animals to fight towards members of their own species.

Fact 2: Lions are members of the 'Panthera leo' species.

Given the two facts above, answer the question "What may cause lions to fight other lions?" with the following options: 
- influenza
 - Pesticides
 - cooperation
 - heat energy
 - competition
 - tradition
 - boredom
 - hormones


 

     competition    