Which of the following is an example of a confined space in many industrial settings?

A silo is indeed a prime example of a confined space in many industrial settings. Confined spaces are typically characterized by limited openings for entry and exit, unfavorable natural ventilation, and may contain hazards such as toxic atmospheres, engulfment, or obstructions. Silos meet these criteria because they are often used for storing grain or other materials which can pose risks such as asphyxiation or collapse if not appropriately managed.

In contrast, office buildings, parking garages, and storage rooms generally do not fit the typical definition of a confined space. They usually have better ventilation, easier access for entry and exit, and are not primarily designed for tasks that would expose workers to the same level of risk seen in silos. Thus, identifying silos as a confined space emphasizes the various hazards that may exist in industrial environments compared to more conventional work areas.