Movement - core: Pectoralis Major.

• A. Latissimus Dorsi
• B. Deltoids
• C. Gluteus Maximus
• D. Pectoralis Major

Answer: (D)

Focus on which muscle powers pushing movements that bring the arm toward the center of the body. The pectoralis major is the primary mover for these actions because it runs from the chest to the upper arm and contracts to bring the arm across or in front of the body and to rotate it inward. This makes it the main muscle responsible for pushing actions like a bench press or push-up.

Latissimus dorsi, while involved in other shoulder movements such as pulling, extension, and adduction, is not the primary driver in chest-pushing movements. The deltoids assist and contribute to shoulder flexion and stabilization, but they do not carry the main load of the pushing motion. Gluteus maximus is unrelated to this upper-body movement, so it isn’t involved here.