What part of africa was the greatest source of enslaved people? why?

In addition to the nearly 50 percent of the total number of enslaved Africans in the United States from these two regions, a considerable number of slaves had their origins on the so-called Gold Coast or “Slave Coast,” which is now the West African nation of Ghana, as well as neighboring parts of the Windward Coast.

c.) biotic: snails; abiotic: temperature climate