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.
Representative democracy and impeachment. I don't know if what you're doing is multiple choice or not.
The open door policy is where every country has equal trade in china
This means the power of the country will be given to the president of the united states. To make decorations etc.
