Concept:Federalism is a system that shares power between central and regional governments to accommodate diversity.
Explanation:Federalism is often adopted because of social, geographical, and cultural differences among the people.
Social factors such as ethnic or religious differences can make a federal system necessary.
Geographical factors like large size or physical separation also encourage federalism.
Cultural diversity creates the need for power-sharing between different groups.
Political sovereignty does not necessitate a federal system.
Sovereignty belongs to the people or the state as a whole, not to any region demanding federalism.
Federalism is concerned with dividing governmental powers, not with creating or defining sovereignty.
Therefore, political sovereignty is the least likely reason for the emergence of a federal system.
Answer:D. political sovereignty