What type of body support is allowed in restraint systems?

The option indicating body belts as an allowed type of body support in restraint systems is correct due to their specific design and function in safety applications. Body belts are utilized primarily to keep a worker secured while allowing freedom of movement, and they are often employed in scenarios where a full containment or support structure is not necessary. They effectively redistribute the forces placed on the body, thus enhancing safety during operations where the risk of falling or uncontrolled movements is present.

Full-body harnesses, while also a form of support, are typically utilized in fall protection systems rather than restraint systems, which focus on limiting worker movement to safe areas rather than preventing falls entirely. Chest harnesses are similar in that they primarily serve different applications and may not provide the same level of support or safety in a restraint context. Back support straps are focused more on providing lumbar support rather than restraint, which means they do not fit the criteria needed for types of body support specifically allowed within restraint systems.