Here are the answers to your questions:
-
The Empire of Ghana was located between the Sahara Desert and major rivers.
-
Mali became known in Asia, Europe, and other parts of Africa when Mansa Musa made a pilgrimage to Mecca.
-
The MAIN basis for the trans-Saharan caravan trade that built the empire of Ghana was salt and gold.
-
Timbuktu and Djenné became centers of learning in the Songhai Empire MAINLY due to the influence of Islam.
-
The civilization that traded with India during the 1400s was the Swahili Coast.