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

Fact 2: Competition Animals compete for food and shelter.

Given the two facts above, answer the question "What may cause animals to fight towards members of their own species?" with the following options: 
- Males and females
 - food and shelter
 - energy of moving objects
 - fashion
 - jealousy
 - vanity
 - parasites
 - threatened


 

  food and shelter       