Which type of protective system is designed to protect the worker from a collapse?

The correct choice is shielding, which refers to a protective system designed specifically to protect workers from cave-ins or collapses during excavation work. Shielding typically involves the use of structures like trench boxes or shoring boxes that can be placed in the excavation site to create a safe space for workers. These structures are designed to absorb the forces exerted by the surrounding earth, thereby preventing a collapse and ensuring that workers remain safe while performing their tasks.

In the context of excavation safety, protecting workers from collapses is critical. The use of shield systems provides a reliable barrier against soil movement, which can occur unexpectedly and lead to dangerous situations. Shielding is a proactive safety measure that helps mitigate risk and comply with safety regulations regarding excavation work.

The other options, while they are related to excavation and trench safety, serve different purposes. Shoring is primarily used to support the sides of an excavation and prevent soil movement, while benching relates to reshaping the sides of an excavation to create a series of steps, and sloping involves cutting back the sides of the excavation at an angle. While these methods can contribute to overall safety, when specifically addressing the need to protect against collapses, shielding is the most appropriate choice.