Concept:The Nupe Kingdom operated a centralized system where ultimate authority rested in a single ruler, the Etsu.
Explanation:The political organization of the Nupe Kingdom was built around the Etsu, who served as the supreme king.
The Etsu held complete control over law-making, justice, and military command.
He did not share power with any elected body or council that could overrule his decisions.
District chiefs and nobles governed local areas, but they served under the Etsu's authority and could be replaced by him.
This concentration of unchecked power in one individual defines an absolute monarchy.
It was not a feudal system, because the Etsu's authority was direct and not based on a pyramid of vassal obligations.
It was not a tribal confederation, because the component groups did not retain independent sovereignty.
It was also not a parliamentary democracy, since there was no elected legislature limiting the ruler.
Thus, the structure matches the classic model of absolute monarchy.
Answer:B. Absolute monarchy