Backs, in the context of support, refer to the structures that provide stability and strength to various systems or objects. In human anatomy, the back consists of the spine, muscles, and ligaments, which work together to support the body and enable movement. Proper back support is essential for maintaining good posture and preventing injuries. In furniture design, backs are often incorporated into chairs and sofas to provide comfort and support for the user. Ergonomic backs are designed to align with the natural curvature of the spine, promoting better posture and reducing strain during prolonged sitting. This is particularly important in office settings where individuals spend long hours at desks.