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

Fact 2: Competition is fierce and resources are scarce.

Given the two facts above, answer the question "What may cause animals to fight towards members of their own species?" with the following options: 
- energy of moving objects
 - lots of mates
 - deforestation
 - food and shelter
 - scarce resources
 - abundant resources
 - lots of resources
 - threatened


 

     scarce resources    