What system provides protection, support, allows body movements, and produces blood cells?

The skeletal system is essential for providing structural support to the body, acting as a framework that holds everything in place. It protects vital organs by encasing them in bone, such as the skull protecting the brain and the rib cage shielding the heart and lungs. Additionally, the skeletal system works in conjunction with the muscular system to facilitate movement; muscles attach to bones and contract to produce motion. Furthermore, it plays a crucial role in hematopoiesis, which is the process of blood cell production that occurs in the bone marrow, a key component of the skeletal system. Thus, the skeletal system integrates protection, support, mobility, and blood production, making it the correct answer.