Why did Africa become the focus of the slave trade from the 1500s to the 1800s?

• A. The Americas needed labor
• B. The African kingdoms invited traders
• C. European nations sought raw materials from Asia
• D. The Portuguese voyages down the west coast of Africa hoping to find new trade routes

Answer: (D)

The main idea here is how European exploration created the route that made Africa the center of the slave trade. Portuguese sailors along the West African coast in the 15th and 16th centuries opened new sea routes and built trading posts, turning the coast into a hub where captives could be exchanged for European goods. This network provided a steady supply of enslaved people to the Americas, where large plantation economies demanded labor. Because those early voyages established the corridor and connections, Africa became the focal point of the slave trade.

Other options describe consequences or motives that don’t explain why Africa became the focal point. The need for labor in the Americas explains demand, not the origin of the trade; African kingdoms inviting traders implies a different dynamic, and seeking raw materials from Asia is not relevant to the Atlantic slave trade.