Which incident facility is the location where personnel and equipment are kept while waiting for tactical assignments?

The staging area is the correct answer because it serves as a designated location where personnel and equipment are strategically positioned in anticipation of tactical assignments during an incident response. This facility allows for efficient deployment of resources by keeping them readily available while maintaining a level of organization and safety.

In the staging area, responders can be assigned specific tasks as needed, which aids in the management of resources and personnel during an incident. This area is often located close to the incident site, allowing for quick access when operations begin.

In contrast, the command center is focused on decision-making and strategic planning, the operational base generally refers to a more permanent setup for housing larger operations or logistics, and the mobile command post is a mobile facility that provides communications and command capabilities anywhere needed, but not specifically for the staging of resources. Each of these plays important roles in incident management, but the unique function of the staging area is to ensure that the right personnel and equipment are on standby for immediate action.