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

Fact 2: Species is a property of genus, genus is a property of family, etc.

Given the two facts above, answer the question "Competition may cause animals to fight towards members in the same what?" with the following options: 
- bloodline
 - existence
 - biome
 - planet
 - clams
 - Mammal
 - abalone
 - genus


 

        genus 