Which of the following is a mode of transportation NOT utilized by the DoD?

The choice of space transport as a mode of transportation not utilized by the Department of Defense is indeed accurate. While the DoD has operational capabilities that extend into space, such as satellite communications and space-based reconnaissance, it does not engage in the type of transport that involves moving personnel or cargo directly through space for missions. The concept of transporting goods or troops via space travel is still largely theoretical and not part of any current military logistical framework.

In contrast, the Department of Defense actively utilizes road, rail, and air transport for a variety of purposes. Road transport allows for flexibility and ease of access to various terrains and locations; rail transport provides a cost-effective means for moving large quantities of resources over land; and air transport, with its rapid deployment capabilities, is essential for reaching distant locations quickly, especially in combat or crisis situations. These established modes are integral to the logistical capabilities of the DoD.