During the First World War, the group of Americans who faced hostility were the <u>German Americans. </u>
During WWI:
Germany tried to get Mexico to attack America
America joined the war on the side of the British against the Germans
As a result of this, many Americans began to see German Americans as the enemy and this led to a lot of hostility towards them that sometimes became mob violence.
In conclusion, German Americans faced a lot of hostility during WW1.
Geographic, meaning confederate is the correct answer. Presidential has to do with the powers in charge . Meanwhile, a confederate government, along with federal and unitary describe the contribution of powers geographically.