What is the primary purpose of the United States Postal Service?

The primary purpose of the United States Postal Service (USPS) is to provide postal services and mail delivery. This agency plays a crucial role in the national infrastructure by ensuring the efficient and reliable movement of mail and packages across the country. The USPS is responsible for not only the delivery of letters but also for various services like registered mail, priority delivery, and international shipping.

By fulfilling its mission, the USPS helps facilitate communication, supports commerce, and ensures that all citizens have access to essential postal services regardless of their location, which is particularly important in rural and underserved areas. This focus on mail delivery aligns with the constitutional mandate to create a post office, as outlined in Article I, Section 8 of the U.S. Constitution, recognizing the significance of communication in a democracy.

The other options, while important functions within the federal government, do not align with the core mission of the USPS. The regulation of telecommunications, management of federal taxes, and oversight of immigration processes are responsibilities designated to other federal agencies, highlighting the unique and specific role of the USPS in American society.