What is one power that belongs to the states under the US Constitution?

The power to give a driver's license belongs to the states under the US Constitution because the regulation of vehicle licensing is primarily a state function. Each state has the authority to establish its own criteria, processes, and rules for issuing driver's licenses, reflecting the concept of federalism, where states maintain powers and responsibilities independent of the federal government. This extends to various aspects of transportation and public safety, allowing states to tailor their requirements to the needs of their residents.

Issuing marriage licenses is also a state power, but the correct answer focuses specifically on driver's licenses. Creating federal laws is a power designated to Congress, while appointing Supreme Court justices is an executive function carried out by the President, with the Senate's confirmation. Thus, these latter activities do not fall under the powers granted to state governments.