A popular model used to illustrate the concept of opportunity cost is called a. the production possibilities frontier.
Answer:
here
Explanation:
The Berlin wall divided families who found themselves unable to visit each other. Many East Berliners were cut off from their jobs. West Berliners demonstrated against the wall and their mayor Willy Brandt led the criticism against the United States who they felt had failed to respond.
<span>Herbert Hoover earned the nickname “The Great Humanitarian" because he voluntarily did services in extensive flood work, especially when the Mississippi River overflows its banks in 1927 causing flood to neighboring areas.</span>
The Aztec Empire is located in Mexico so I believe it would be number 3
Native tribes made advancements in farming and medicine before Europeans arrived.
