Answer:
Africans captured and sold people to Europeans.
Explanation:
Most slaves from the African continent came from defeated groups, either in the hands of other African groups, or mostly from European armies. These were sold to European merchants in exchange for valued goods. From there, they were shipped mostly to the Americas and the Caribbean, which had a growing demand for more (and cheaper, if possible) labor, and slaves, as their upkeep was minimal, was more economical then hired hands.