How did the frontier differ from the settled areas along the east coast

Explanation:

American frontier, in United States history, the advancing border that marked those lands that had been settled by Europeans. It is characterized by the westward movement of European settlers from their original settlements on the Atlantic coast (17th century) to the Far West (19th century).

it's no easy i swear it's hard

c. free trade can lead to low pay for workers in poorer countries.