How did the enslavement of black people help white americans?

The enslavement of black people help white americans by doing the work that the white people. The whites had no one else to compete with. The whites had better opportunities.

Explanation:

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the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.

answer; adoption agencies tend to place separated twins in similar homes;