Answer:
centralized = concentrate (control of an activity or organization) under a single authority
Since the countries were becoming industrialized, they needed more and more resources. Since they couldn't have them in their own countries, they had to conquer others. That's why they would make colonies and spread their empires. That way they could take coal or oil or lumber or similar things from the colony and use it for their own purposes. Usually, they would leave nothing to the colony.
Migration:-
Migration is to leave the country you live in, your own country and go live in another country you chose forever.
The Native Americans had unsophisticated weaponry... Compared to it's counterpart the settlers which had muskets and rifles with gun powder bullets.
The Natives had (Bows, Knifes, Spears)
Hope this helps :)
Edit:
The advantages the Native Americans had was the land, they knew the land better and could maneuver around the settlers and surprise attack them :)
Answer:
Often there will actually be strong personal power and personal possessions disguised by an elite claiming to speak for “everyone”.
Explanation: