Which of the following tags prohibits the operation of equipment?

The correct choice is the Danger tag because it is specifically designed to indicate that an immediate hazard exists. This tag prohibits the operation of equipment to ensure the safety of personnel and prevent damage to the equipment. When a Danger tag is in place, it signals that the equipment cannot be operated under any circumstances until the issue is resolved and the tag is removed by an authorized person.

In contrast, a Caution tag alerts personnel to potential hazards but does not outright prohibit operations, allowing for more flexibility while still exercising some degree of caution. The Temporary tag is used for equipment that is in a state of change or for temporary conditions, and it doesn't usually indicate a prohibition. A Warning tag provides a caution or indicates a potential risk but doesn't necessarily prevent the operation of the equipment either. Understanding these distinctions helps emphasize the critical role of the Danger tag in ensuring workplace safety.