Final answer:
To assume the position of attention in military drill, heels should be brought together to form a 45-degree angle; this reflects discipline and uniformity in posture.
Step-by-step explanation:
To assume the position of attention, bring your heels together evenly and point your feet out equally to form a 45-degree angle. This posture is a fundamental component of military drill and ceremonies, which is based on discipline and the need for uniformity and precision in a unit's movements. When standing at attention, the body is in the anatomical position: upright stance with upper limbs to the side of the body and palms facing forward. Movements such as plantar flexion, which involves bending at the ankle to lift the heel as when standing on the toes, are associated with various positions but not with the position of attention.