Question

what establishes the structure of local government?
the u.s. constitution

the state constitution

the county charter

Explanation:

In the U.S. system, local governments derive their authority from state governments. State constitutions typically outline the framework and structure for local governments (e.g., counties, municipalities), while the U.S. Constitution focuses on federal and state powers, not direct local structure. A county charter is a document for a specific county, not the general establisher of local government structure.

Answer:

the state constitution