You are presented with the question "What may cause lions to fight other lions?" and the following answer choices: 
- influenza
 - Pesticides
 - cooperation
 - heat energy
 - competition
 - tradition
 - boredom
 - hormones

Now knowing that competition may cause animals to fight towards members of their own species and lions are members of the 'Panthera leo' species, choose the best answer.


 

     competition    