What invention most to make the shift to large plantations throughout the deep south profitable?

The invention that helped was the

Cotton Gin

It is a machine that is used to separate cotton from the seeds

mapmaking. cartography had been an art form for many years, but it wasn’t until the renaissance when ptolemy’s ancient system of latitude and longitude was rediscovered that mapmakers were able to make surprisingly accurate and useful maps.

i liked the part where, i got to pick which statements fitted the questions. i didn't really like doing all the hard work.