In which form of political system is governmental power formally divided between a central national authority and various constituent regional units (like states or provinces)?

💡 Explanation:

A federal system is characterized by a division of powers between a central national government and sub-national governments (states or provinces), with each having distinct and constitutionally protected spheres of authority. In contrast, a unitary system centralizes power, a confederal system grants primary power to regional units, and a parliamentary system defines the relationship between the executive and legislative branches.