Probably 1, however I can see why that would be a tiny bit confusing.
Building walls protects from incoming invaders(at least back in the day), creating armies, makes a force to go and fight to protect the people, and what was the other one? Oh yea, moving to a safer place.
Doing that would mean making invasions less likely, and making your people feel and be safer.
Hope this helps.
C due to the fact that they needed to do that
Answer: Oregon Trail
Explanation: Hope it helps :)
They entered on the side of the Allies. (Britain, Russia ECT) to oppose the Axis Powers. (Japan, Germany, Italy)
Masses of framer slaves were needed to work for landowners
