What is structure A? How does it function?

What would you call a political system that is only meant to last for a short time

What is a country called that is technically independant but is controlled by another country

Which factor contributed to the rise of african empires such as ghana and mali ? a. their creation and involvement in trade networks b. they focused only on agricultural production. c. they didn’t engage in warfare with other nations d. their geographic location protected them from attacks.