Answer:
Ida B. Wells and Mary White Ovington, who were both founders of the National Association for the Advancement of Colored People were active in African American Rights. The NAACP played a very important role in an attempt to remove segregation and restore justice, especially in the South. The most important accomplishment, which was reached, was to end segregation in public schools.
The main reason is that the North wasn't as agricultural so they didn't need slaves working the fields they where more mercantilist ( an economic system used to boost the nation's wealth using trade.)
The answer is a republic. In this form of government, a leader or group of leaders is chosen by the people. This differs from a democracy (which it is commonly confused with) in that in a democracy every citizen participates in decision-making, not just an elected leader or body.