Final answer:
The economic structure of the Kingdom of Ghana included the monarch's control over gold and trade, levying of customs on copper, and participation in the trans-Saharan slave trade.
Step-by-step explanation:
An example of an economic structure of the Kingdom of Ghana is the control of gold and trans-Saharan trade by the monarchy. The monarch, alongside the Muslim advisors and administrators, occupied the top of the social hierarchy and managed trade relations. Wealth generation was pivotal, with commodities such as gold, copper, and captives from slave raids contributing to the empire's affluence. The king's economic power included levying duties on copper and participating in the slave trade, with annual transportation of captives across the Sahara.