Final answer:
South Carolina and Georgia, two British colonies in the Carolinas, had social and economic practices similar to Caribbean plantations, relying heavily on African and African-American slave labor for rice and indigo plantations.
Step-by-step explanation:
British colonies with social and economic practices similar to Caribbean plantations include the Carolina colonies, specifically South Carolina and Georgia. These colonies had a thriving economy based on African and African-American slave labor, with rice and indigo plantations relying almost exclusively on enslaved Africans for labor. South Carolina, in particular, had a majority Black population due to the large number of enslaved people in the colony. The development of labor-intensive crops and the importation of enslaved Africans were key factors in the economic success of these colonies.