Which of the following describes the function of the rhomboid major muscle?

The rhomboid major muscle plays a crucial role in the movement and stabilization of the scapula, which is essential for shoulder mechanics. It primarily functions to retract the scapula, pulling it towards the spine, which is important for maintaining proper posture and shoulder alignment. Additionally, the muscle facilitates rotation of the scapula, allowing for efficient overhead movements. By fixing the scapula against the thoracic wall, the rhomboid major also provides a stable foundation for other shoulder muscles during various upper limb activities. This combination of actions—retraction, rotation, and fixation—supports both dynamic and static shoulder mechanics, particularly in activities that involve lifting or pulling motions.