Final answer:
If you approach an unconscious victim, assess the situation and ensure your safety. Then, try to wake the victim and call for help if needed.
Step-by-step explanation:
If you approach a victim from behind who appears to be unconscious, the first action you should take is to assess the situation and ensure your safety.
You can do this by observing your surroundings and looking for any potential hazards or dangers.
Once you have determined that it is safe to approach, you should gently try to wake the victim by calling their name or tapping their shoulder.
If they do not respond, it is important to immediately call for help and notify an adult or authority figure who can provide further assistance.