Final answer:
The demographics of American slave societies were similar in terms of racial composition but differed in terms of economic structure.
Step-by-step explanation:
The correct answer is A. Similar: Racial composition, Different: Economic structure.
In American slave societies, the racial composition was similar. Slavery primarily involved people of African descent who were enslaved by Europeans and later Americans. However, the economic structure of these societies differed. Some slave societies, such as those in the southern colonies of British America, relied heavily on plantation agriculture and the labor of enslaved Africans, while others, such as the northern colonies and some Caribbean islands, had more diverse economies.
For example, in the southern colonies, enslaved Africans were primarily used for large-scale cash crop production, such as tobacco, rice, and indigo. This created a plantation economy that was heavily dependent on slave labor. In contrast, the northern colonies had a more diverse economy that included small-scale farming, trade, and industry, although slavery still existed in these regions.