What is the main focus of Article 4 of the Constitution?

The main focus of Article 4 of the Constitution is on the relationship between states and the federal government. This article outlines how states are expected to interact with one another and with the federal government, emphasizing concepts such as the Full Faith and Credit Clause, which requires states to recognize and respect the public acts, records, and judicial proceedings of other states. Additionally, it addresses the admission of new states into the Union and ensures that all states are guaranteed a republican form of government.

This framework helps to maintain a consistent legal and political structure across the country, which is vital for the functioning of a federal system. The other options, while important to the overall structure and function of the Constitution, do not pertain specifically to the content of Article 4. For example, the Amending the Constitution pertains to Article 5, Ratifying the Constitution relates to Article 7, and the Supremacy Clause is found in Article 6.