Being displaced means moving from one palce to another. People living at one place since the beginning usually have the right over that piece of land. Invaders often conquer these lands and take it as their own.
This justifies what answer for what question? Q & A: 
user
The aboriginal people ended up being displaced by settlers who justified themselves with the fact that the displaced people didn't have a formal system to do what?
Options:
- fight back
- spend time
- own home
- talk to each other
- own land
own land
assistant