What section of the body is the Sternum associated with?

The sternum, commonly known as the breastbone, is a flat bone located at the center of the chest. It serves as the primary connection point for the ribs via costal cartilage, which forms the rib cage that protects vital organs such as the heart and lungs. The sternum plays a crucial role in the respiratory system, as it helps maintain the structure of the thoracic cavity, allowing for efficient breathing.

Choosing the chest as the associated section of the body recognizes its anatomical significance and physiological functions, primarily related to respiration and protection of thoracic organs. In contrast, the other options—skull, leg, and arm—do not relate anatomically or functionally to the sternum, which sets the context for understanding why the chest is the correct answer.