Final answer:
In Virabhadrasana II, the scapula undergoes superior rotation and retraction, enabling stable, extended arm positions and contributing to an open chest stance.
Step-by-step explanation:
In Virabhadrasana II (Warrior 2 pose), the movement of the scapula involves both the superior rotation and the retraction of the scapulae. This coordinated action stabilizes the shoulder blades as the arms are extended at shoulder level. During superior rotation, the glenoid cavity of the scapula moves upward, allowing for a greater range of motion in the arms, while retraction involves the posterior movement of the scapula, contributing to a strong, open chest position.