Which of the following best describes a situation requiring the use of shoring?

Shoring is a vital safety practice used to support the sides of an excavation, preventing collapse, particularly in situations where the excavation is adjacent to existing structures. When excavating next to a building, the integrity of the building's foundation can be jeopardized due to soil movement or loss of lateral support. Therefore, shoring is necessary to ensure not only the safety of workers but also to protect the nearby structure from potential damage.

In contrast, while trenching over 5 feet deep and trenching in sandy soil may require specific safety measures, they are not uniquely focused on protecting adjacent structures as shoring does. Additionally, stating that all excavation work in urban areas requires shoring overlooks the fact that not all urban excavations are near existing buildings or structures. Thus, shoring is particularly relevant and necessary in the context of excavating next to a building.