Answer: Ghana was the first kingdom to secure complete control of the Saharan trade in the south. thanks to its convenient location in the crossroad of different trade routes.
Step-by-step explanation:
Going north, African gold is the most valuable commodity, and Ghana´s location allows the control of the movement of gold from Bambuk.
The trade of slaves is also an important commodity, followed by ivory, ostrich feathers, and the cola nut.
Going south, salt is the most valuable commodity. There´s also a trade of dates, and metal goods.