I need help with question 16

Answer:
Explanation:
As a result of trans-Saharan trade connecting West Africa to the North, the Berbers became very well known merchants of renown as they handled a lot of the transportation.
West African cities such as Timbuktu, became major centres of culture and trade as the Trans-Saharan trade went through them and led to people of of kinds of culture meeting there to trade.
Religion - especially Islam - spread into West Africa as a result of the trans-Saharan trade as most of the merchants were Muslim.