Answer:
The expansion of plantation agriculture from Brazil into the Caribbean drove the expansion of the slave trade. By the end of the trade in the nineteenth century, more than eight out of every ten Africans taken in bondage to the Americas had disembarked (arrived) in either Brazil or the islands of the Caribbean.
With the invention of the cotton gin, cotton became the cash crop of the Deep South, stimulating increased demand for enslaved people from the Upper South to toil the land.