What are three causes that led to the civil war?

slavery, sectionalism and state's rights.

Explanation:

The Abolition Movement, The Election of Abraham Lincoln, and Economic and Social Differences

Explanation:

The Abolition Movement: The Northerners were against slavery and they began to fight against the system of slaves, becoming Sympathetic with them. They wanted to end slavery.

Election of Abraham Lincoln: The Southerners believed that Lincoln was against slavery and was biased towards the North. Therefore, seven of the states left the Union before Lincoln's presidency.

Economic and Social Differences: The Southerners mainly focused on slavery and farming lives, meanwhile the Northerners focused mainly on cities and the industrialization life.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!

i know number 8 is something about only using 3/5 of the slave votes.