Answer: What was the main use for airplanes in World War I? Airplanes enabled soldiers to observe troop movements and locations. Airplanes allowed for the quick movement of resources. Airplanes eliminated the need for soldiers in the trenches.
Explanation: In my words i think because if they need to shoot from high ground insted of from the floor so they can get a better shot.
 
        
                    
             
        
        
        
Answer: question 6 is “c” to defend member nations against Soviet expansion and aggression. 
Question 7 is a little more difficult because while America did want to spread democratic values, they also wanted a bulwark against Soviet expansion. I would probably say “d” in this case. 
Explanation: The Soviets had already moved into Asia at the end of WWII, taking several of Japans processions, which included parts of N. Korea and Japanese islands. They had joined the war against Japan, answering a request from the US for assistance. It was important that the US not abandon Japan after WWII since there’s a good chance the Soviets would’ve moved in just as they did in parts of Asia and East Europe. 
 
        
             
        
        
        
The 15th amendment is the answer
        
             
        
        
        
Native American tribes, including the Omaha, Oto, Missouri, Pawnee, Arapaho and Cheyenne, all ceded (gave up) land in Nebraska to the U.S. government. In all, there were 18 separate treaties between 1825 and 1892 in Nebraska alone. These treaties were a part of a much larger pattern of land transfers that allowed an explosion of European settlement. By 1850, the tribes had seen more people moving through along the Platte River. The Homestead Act, which gave free land to settlers, meant that large numbers of immigrants were now going to stay in the area. In this section, there are two major stories about Native Americans during the settlement period. First, there is the story of how native people met the challenges of living on this plains landscape. And second, there is the story of conflict as more and more people tried to live on the same land.
        
             
        
        
        
Answer:
-The profit motive plays a bigger role in socialist systems than it does in capitalist system. 
-Free market forces affect the economy more in socialist systems than they do in capitalist systems.