Which system gives the body shape, protects internal organs, and provides body movement?

• A. Muscular System
• B. Skeletal System
• C. Nervous System
• D. Circulatory System

Answer: (A)

The main idea is that one system provides the framework, protection, and a base for movement. The skeleton forms the body's shape by giving a rigid framework of bones. It also shields vital organs—think of the skull protecting the brain and the rib cage guarding the heart and lungs. Movement comes from bones acting as levers that muscles pull on; muscles attach to bones and, when they contract, they move the joints to produce motion. While the muscular system is essential for movement, it relies on the skeleton for leverage and structure and does not by itself determine body shape or protect organs. So, the system that fits all three roles is the skeletal system.