Which of the following actions can help prevent trench collapses?

Using proper shoring methods is crucial in preventing trench collapses because these systems provide the necessary support to the walls of the trench, reducing the risk of soil movement that can lead to a collapse. Shoring methods include the installation of supports such as hydraulic or mechanical systems, which are designed to resist the forces exerted by the surrounding soil. When implemented correctly, these methods help maintain the integrity of the trench walls, ensuring that workers can operate safely within the trench.

In contrast, making the trench wider, removing soil away from the trench, or allowing water to accumulate in the trench can all increase the likelihood of a collapse. A wider trench may create unstable walls, while removing soil can undermine the support for the trench walls. Allowing water to accumulate can lead to soil saturation, which significantly weakens the soil's ability to hold its structure, thus exacerbating the risk of a collapse. Therefore, the use of proper shoring methods is the best preventive step against trench collapses.