A county ________ becomes the organic law of the county.

The correct answer is a charter, as a county charter serves as the foundational legal document that establishes the organization, powers, responsibilities, and functions of the county government. It is akin to a constitution at the county level, outlining how the local government operates and is structured.

A charter typically provides a framework for local governance, including the creation of various offices and departments, the electoral process for county officials, and the processes by which laws and regulations are enacted. This contrasts with statutes, which are laws enacted by a state legislature, ordinances that are local laws typically established by cities or towns, and regulations which are rules created by governmental agencies to enforce laws. The significance of a charter lies in its role as the supreme legal document guiding all county governance, thus making it the organic law of the county.