Which two military services have components in the National Guard?

The correct choice highlights the components of the National Guard, specifically indicating that the Army National Guard and the Air National Guard are the two military services that have established components within the National Guard framework.

The Army National Guard serves as a reserve component of the United States Army, allowing state governors to deploy soldiers for various missions, including disaster response and assistance or federal missions as part of the broader Army establishment. Similarly, the Air National Guard functions as a reserve component of the United States Air Force, performing similar dual roles for state and federal missions, while also maintaining unique operational capabilities related to air support and logistics.

In contrast, the other options mention services that do not have a direct alignment with the National Guard structure. For example, while the Navy and Coast Guard are essential branches of the military, they do not have components that operate within the National Guard system. The Marines are a separate branch of the U.S. military and do not have National Guard components. The Air Force and Coast Guard also do not combine under the National Guard. This distinction is crucial to understanding the organizational structure of the U.S. military and the specific role of the National Guard.