What is a key characteristic of the Military Postal Service?

The Military Postal Service functions as an extension of the United States Postal Service (USPS). This means that while it operates in support of military personnel and their families, it is integrated with the broader USPS logistics and operations. The Military Postal Service ensures that mail can be sent and received even in deployed environments or locations where military forces are stationed, leveraging the established postal infrastructure of the USPS to facilitate communication and outreach for service members. This integration allows for a more efficient and reliable mail service that meets the unique needs of military personnel, as well as their families, regardless of their location.

In contrast, the other options present limitations or inaccuracies about the scope and operation of the Military Postal Service. It extends beyond just operating within the U.S. or serving solely the Army, providing comprehensive services to various branches of the military. Additionally, it is not independent of the USPS, as it relies on the USPS for many of its operations, making the role and relationship between the two entities crucial for effective postal service delivery in military contexts.