Competition may cause animals to fight towards members of their own species.
Competition animals compete for food and shelter.
Food and shelter may cause animals to fight towards members of their own species.
What may cause animals to fight towards members of their own species?
Options:
[1] Males and females
[2] food and shelter
[3] energy of moving objects
[4] fashion
[5] jealousy
[6] vanity
[7] parasites
[8] threatened