The northerners didn't need slavery because their main economy is manufacturing at factories.
Because they didn't have anything to do with slavery, they viewed it with a critical eye.
The southerners had slavery because they had giant plantations to farm cash crops. The soil was futile and had a suitable climate.
There were soo many things they brought back here are just a few you can choose three
Food: Rice, coffee, Dates
Household goods: Mirrors, carpets, writing paper
Ideas: Irrigation, Algebra, Chemistry
The water frame could operate at a faster rate and therefore produce threads faster and reduce the number of people needed to run the machine
All your information is well organized and simple to both comprehend and present
