Final answer:
The Civil War was caused by slavery, which brought about tensions between the North and the South.
Step-by-step explanation:
The cause of the Civil War
The cause of the Civil War in the United States was slavery. The conflict between the North and the South revolved around the question of whether slavery should be permitted in new territories that were being acquired by the United States.
Slavery was deeply ingrained in the Southern states, where it formed the basis of their agrarian economy. The Southern states relied heavily on enslaved labor to work on their plantations, while many Northern states had already abolished slavery.
This issue led to increasing tensions between the North and the South, eventually leading to the outbreak of the Civil War in 1861.
Learn more about The cause of the Civil War