Answer:
The advance of technology and urbanization
Step-by-step explanation:
Arising in the 18th century, the industrial revolution was caused by the shift from agricultural societies to more urban and industrialized advances. The revolution was crucial for more efficient working, such as farming and transporting materials. The most historical improvements are the transcontinental railroad, which could transport materials from one side of the world to another, and the cotton gin, which sped up the cotton-picking process by 2x. The south was very agricultural since the region was dominated by slaves and servants, by making people do all the work, they got just enough materials. The north, however, was ahead of the south in technology and was more efficient in producing goods. The north was better than the south and wanted to south to give up slaves and move to more humane industrial workplaces. I hope this helped :)