What was the main reason that early settlers gradually spread across the americas?

The main reason why early settlers gradually spread across the America because of the attacks from the terrorist in which motivate and ushered them to gradually spread as they look for a place where they could stay and a place that would be beneficial for them in terms of having food and shelter that they need.

explanation:

i think it is in quadrant 4.

the five year plans were part of a command economy. there was little choice in what would be emphasized for the current 5 year period.

the answer to democracy or totalitarianism is a bit harder. in stalin's time, russia was totalitarian. now that's not entirely true. putin has moved towards at least the boundary.

your answer is c i hope that