Before the Civil War, the South's economy relied heavily on slave labor. After the Civil War ended slavery, slave labor was mostly replaced by

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Sharecropping, along with tenant farming, was a dominant form in the cotton South from the 1870s to the 1950s, among both blacks and whites. ... Following the Civil War of the United States, the South lay in ruins. I hope you found this helpful, and if so, please mark as branliest, thanks :P
Machines and industrial items because the south were dealing with those things whilst the north used human labor which means farming and agricultural stuff