Respuesta :
Answer:
Trade
Explanation:
Muslim traders introduced the use of camels for transportation to north Africans around 750 C.E. Camels made trade across the dry Sub-Saharan region possible. By the 11th century, trade and industry were booming in many areas of Sub-Saharan Africa. Cities and towns began to develop along the trade routes and in areas where resources such as gold, spices, and other precious metals could be found.