What Article of the Constitution gives federal courts the right to rule on cases involving the Constitution federal laws or treaties?

Article III of the U.S. Constitution establishes the judicial branch of the federal government and grants federal courts the authority to hear cases involving the Constitution, Federal Laws, and treaties. It specifically outlines the jurisdiction of federal courts, including cases arising under the Constitution and laws of the United States, as well as treaties made under their authority. This article is fundamental in ensuring that federal courts can interpret and apply the law in these matters.