Final answer:
The first Europeans to establish slave and trading posts in Southern Africa were the Portuguese.
Step-by-step explanation:
The first Europeans to establish slave and trading posts in Southern Africa were the Portuguese. In the 15th century, Portuguese explorers sailed around the Cape of Good Hope and began setting up trading posts along the coast, including places like Mozambique and Angola. These posts served as a crucial hub for the transatlantic slave trade, where enslaved Africans were captured and transported to the Americas.
Learn more about European colonization in Southern Africa