Answer:
The North had excellent ports. This made it easier to ship products and to trade. Thus, the North was more suited for manufacturing. It made more sense for the North to have industries and for the South to farm.
Explanation: this is half of the question, i think, but this is all i have! sorry for not alot of info, but have an nice day/night! UwU
The potato famine. filed crops
All the answers above are true
It would be the US. The US economy sky rocketed after WW2.