Which of the following is a power reserved for the states?

The correct choice highlights a fundamental aspect of state powers in the United States. Establishing local governments is indeed a power reserved for states. The Tenth Amendment of the U.S. Constitution emphasizes that powers not delegated to the federal government nor prohibited to the states are reserved for the states. This includes the authority to create and manage local governments, allowing states to determine how their communities are governed, including the formation of counties, municipalities, and other local entities.

In contrast, printing money, regulating commerce between states, and conducting foreign affairs are powers explicitly designated to the federal government. The ability to issue currency is a function of the federal treasury, while interstate commerce is regulated by Congress to ensure a unified economic framework. Foreign affairs are under federal jurisdiction to enable a cohesive international policy. Hence, the reservation of local governance to the states reflects the balance of power intended by the framers of the Constitution.