Which of the following is an example of an FBO?

An example of a Fixed Base Operator (FBO) is Atlantic and Signature because FBOs are private companies that provide essential services to general aviation and, in some cases, to commercial aviation. These services include fueling, hangaring, maintenance, and other support for aircraft and their passengers. Atlantic and Signature are both companies that operate at various airports, providing these services and facilities to private pilots and their aircraft.

In contrast, the other choices involve major airlines or ground service providers that do not fit the traditional definition of an FBO. Delta Airlines, United Ground Services, and SkyWest Airlines are primarily involved in commercial airline operations rather than offering a range of general aviation support services. This distinction is key to understanding the role of FBOs in the aviation industry.