The kingdoms of ghana , mali and songhai were economically successful because of their

gold and salt

Explanation:

This empires which occupy the same west-african region over the course of history made good trades with their national resources.

They represented different ethnics groups and religion but all had in common the weel use of their natural resources to trade with europeans and arabia

They songhai also manage to take a grab on the silk route once the ottoman conquer the byzantine empire and closed the traditional route trought the meditarrean for europeans.

whole quiz

1. the sum of all activities involved in getting high-quality products into the marketplace

2.operations

3. the principle of looking at the supply chain as a whole in order to improve the overall flow through the system.

4. produced; performed

5. activities producing tangible products, such as radios, newspapers, buses, and textbooks.

6. activities producing intangible and tangible products, such as entertainment, transportation, and education.

7.   customer focus

8. analyzing a competitor's products to identify desirable improvements

9. the systematic direction and control of the processes that transform resources into finished projects that create value for and provide benefits to consumers.

10. operation management.

your welcome leave a rate and a < 3