What was one economic difference that caused sectionalism? 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.

The second alternative is correct.

The War of Secession lasted between 1861 and 1865 and occurred between the North and the South of the United States.

The main cause of the American Civil War lies in the conflict of interests between the states of the South and North, especially, with respect to the economic model. The South adopted an economy based on latifundia, production for export, and slave labor, while the North was in favor of abolition and focused on industry. In this way, abolitionist and protectionist policies were developed in the North as slave and liberal policies in the South. In other words, there was an ideological and economic divergence on what the country's development project should be.