Which of the following describes hard barriers in a rescue operation?

Hard barriers in a rescue operation refer to structures that provide physical support and stabilization to maintain the integrity of the rescue site and protect rescuers and victims from potential hazards. These barriers are typically made from durable materials and are designed to withstand significant forces, ensuring that they remain in place during a critical rescue situation.

In the context of a rescue operation, such barriers can include items like shoring systems, walls, or rigid support structures that prevent further collapse and create a safe environment. Their primary function is to enhance stability, allowing rescuers to safely navigate, work, and perform extrications without the risk of additional structural failures.

The other options involve materials and devices that serve different purposes within a rescue scenario. Soft materials focus on cushioning and protecting individuals during impacts but do not provide the sturdy support necessary for stabilization. Temporary dividers for crowd control manage the movement of people but are not intended for structural support. Devices used to secure personnel may involve harnesses or anchor points but do not constitute hard barriers as defined in rescue operations.