What are the parts of lifebuoy?

A lifebuoy typically consists of several key parts: the buoyant ring, which is usually made of foam or plastic to provide flotation; a rope or line attached around its circumference for easy retrieval; and often a reflective band for visibility in low light. Some lifebuoys may also include a built-in light or a whistle for signaling. Additionally, they are designed to be brightly colored to enhance visibility in water.