Which concept best describes the relationship between states and the federal government in the United States?

The concept that best describes the relationship between states and the federal government in the United States is federalism. Federalism refers to a system of governance in which power is divided between a central authority and constituent political units, in this case, the states. In the U.S., the Constitution establishes federalism by delegating certain powers to the federal government, reserving others for the states, and sharing some powers between the two.

This division of powers allows for a balance that enables the federal and state governments to operate independently while also collaborating in areas where their responsibilities overlap. For instance, both levels of government can legislate and enforce laws, but such powers may vary in scope and application. Federalism facilitates regional governance tailored to local needs while maintaining a unified national policy framework.

The other concepts highlighted—unilateralism, confederation, and centralism—do not accurately depict the American system of government. Unilateralism implies one party is acting independently without cooperation, which does not reflect the cooperative aspect of federalism. Confederation suggests a loose alliance of states with a weak central authority, which is not the case in the U.S. where the federal government holds significant power. Centralism refers to a concentration of authority within a central government, which