Final answer:
The Ghana Empire formed along the Niger River and was an important trading center in West Africa.
Step-by-step explanation:
The correct answer is Ghana Empire. The Ghana Empire, also known as the Wagadou Empire, was located along the Niger River in West Africa. It was an important trading center and gained wealth from controlling the trans-Saharan trade routes. The empire flourished from the 6th to the 13th century, and its economy relied heavily on gold and salt trade.
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