What are two factors that led to the devlopment of trans sahran trade?

Two key factors that contributed to the development of trans-Saharan trade were the emergence of powerful empires in West Africa, such as the Ghana, Mali, and Songhai empires, which created a demand for goods like gold, salt, and textiles. Additionally, the introduction of the camel as a mode of transport facilitated long-distance trade across the harsh desert terrain, enabling merchants to traverse the Sahara more efficiently and safely.