What allowed the Nok culture and the kingdoms of Aksum and Ghana to create wealth and become powerful?

Ghana grew wealthy from trade through taxation. Along with gold and salt traders carried copper, silver, cloth and spices. As Ghana was in a prime location in between salt and gold mines, rulers taxed traders passing through Ghana. Traders had to pay taxes on the goods they carried to Ghana and took away with them.

Explanation:

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answer: wait what

explanation:

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