Answer:
Article IV
Step-by-step explanation:
Article IV of the U.S. Constitution outlines the relationship between states, the responsibilities and duties of each state and the obligations of the national government to the states. According to this article, the government must guarantee every state a republican form of government and protect them against invasion and domestic violence (like local fighting, or riots) if the State legislatures ask for it. Furthermore, the government also has to make laws to decide how to check and tests states' public acts, records, reports, and judicial proceedings.