The answer is b
I hope it helps
Invasions of people--many of the groups came as military and fought the Romans as invading forces.
Counterclaim--they were migration patterns as they were attempting to gain access to an empire with advanced trade and education. Migrating to the Roman Empire gave a person or group with extra resources.
I don't know the answer choices but I do know that scarcity is a lack of a certain resource. This resource, which there is not a lot of, then costs more. The less there is of something, the harder it is going to be to get it.
Corn, Beans, and Squash were the 3 sisters of the Iroquois Confederacy Culture.
