Final answer:
A. Halt
The command derived from 'pahinto' that indicates a transition from motion to a rest position and back to attention is called 'Halt'. This is a common command in military and marching band drills.
Step-by-step explanation:
The command that comes from the word "pahinto," and is given to transition from motion to at rest position and back to proper attention, is called 'Halt'.
This is often used in military or marching band contexts to indicate that participants should stop moving and stand at attention.
To be 'at ease' or in 'rest position' typically indicates a slightly more relaxed posture, but still requires staying in place. 'Stand Down' usually denotes a dismissal or a return to an unofficial posture.