Which of the following is one of the four rest positions in Drill and Ceremony?

Parade Rest is indeed one of the four recognized rest positions in Drill and Ceremony. This position allows individuals to relax while remaining in formation and ready to respond to commands. In Parade Rest, the feet are shoulder-width apart, hands are clasped behind the back, and individuals stand up straight, maintaining a presentable posture. This position emphasizes discipline while providing a slight degree of comfort during longer periods of standing.

The other positions, like Attention or Command Rest, serve different purposes. Attention is the position of readiness and requires full posture and focus, while Command Rest allows for a bit more relaxation but still maintains a level of awareness. The Ready Position is not a designated rest position within drill formations, focusing more on a combat or operational stance rather than formal rest. Hence, Parade Rest is the correct answer as it is specifically designated for formal settings within military protocol.