My teacher has assigned me to make a new world. I have created a 'enemy' and she said I need a reason the enemy became the enemy. Have any suggestions?

I can be disputed territory or ideologies. Another possibility is that the enemy wants to appropriate some aspects of your world. The enemy could also be natural, in terms of climatic, health and/or geological disturbances.

I hope this helps. Thanks for asking.

Well, you can have your enemy be there because It is greedy or it wants something in your world.

Thanks alot. This is Carson.