When two kids find an unresponsive teenager lying on the sidewalk, what is the first action they should take?

The first action the kids should take is to check the scene to ensure it’s safe. This is crucial because approaching an unresponsive individual in an unsafe environment could put the helpers at risk of harm—whether from traffic, hazardous conditions, or any potential threats in the vicinity. It's essential to protect oneself before offering assistance to someone else.

Once the scene is confirmed as safe, they can then proceed to check the victim’s responsiveness and, if necessary, call for help. Administering first aid or evaluating the victim’s pulse should only happen after establishing that the environment is secure. Safety for both the helpers and the victim is the fundamental priority in any emergency situation.