What was one economic difference that caused sectionalism?

Question

The South’s economy was based on foreign trade.
The South’s economy relied heavily on slave labor.
The North’s economy struggled because of a lack of roads.
The North’s economy was primarily agricultural.

Answer 1

One economic difference that caused sectionalism was that the South’s economy relied heavily on slave labor. This dependence on slavery for labor in agricultural production created significant social, economic, and political divisions between the agrarian South and the more industrialized North, which was moving towards free labor and wage-based work environments.