Which natural resource was the key to ghana and mali's wealth? gold oil diamonds tungsten

The correct answer is "gold".

Explanation:

Ghana and Mali were two of the most notorious empires of West Africa during pre-colonial times. The wealth of these two empires lied largely on the abundance of the natural resource of gold in these territories. Ghana and Mali profited mostly from the trans-Saharan gold trade, selling their gold to distant merchants through Berbers that utilized camels that carry large loads of the product.

D

Explanation:

It all began when the Romans overthrew their Etruscan conquerors in 509 B.C.E. Centered north of Rome, the Etruscans had ruled over the Romans for hundreds of years. Once free, the Romans established a republic, a government in which citizens elected representatives to rule on their behalf.