Concept:The pre-colonial Igbo political system was organized around village assemblies and consensus, not a centralized ruler.
Explanation:Power in the pre-colonial Igbo system was shared among family heads, age grades, and village councils.
There was no single king or central authority controlling the whole community.
This made the political system highly decentralized and participatory.
Decisions were reached through discussion and general agreement at village meetings.
Therefore, the key feature was the effective decentralization of power.
Answer:D. power was effectively decentralized.