What tool is used to signify a designated area of safety?

The correct choice is cones, as they are widely recognized as a tool used to designate safe areas, particularly in environments like airports, construction sites, and other locations where safety is a concern. Cones are often bright in color, making them highly visible, which helps in alerting personnel to restricted or safe zones. Their use aids in directing traffic and ensuring that individuals are aware of boundaries to avoid hazards.

In contrast, chocks are generally used to prevent vehicles from rolling, vests are worn by individuals for visibility and identification, and wands typically function as signaling devices for directing traffic or pedestrians. While each of these tools serves its purpose in maintaining safety and organization, cones specifically stand out for their role in marking off areas to promote safety awareness.