Which type of governmental power does a unitary system hold?

A central power (a concentrate power)

Explanation:

It is characterized by the concentration of political power in the figure of a central authority, which takes the decision-making agenda of the state and directs the commands of this converging nucleus to the most distant spaces of penetration in the territory of that country. Although there are degrees of state centrality, a particular restriction of freedom of action for the periphery manages the decision-making flows in this model, allowing the central authority figure to concentrate and manage all units of that government structure.

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.

can you explain a little further maybe give multiple choice? ?