What should you ensure prior to performing CPR?

Prior to performing CPR, it is crucial to ensure that the scene is safe. This means assessing the environment for any potential hazards that could pose a risk to you, the victim, or bystanders. Safety is a primary concern because if the scene is not safe, you could become a victim yourself, which would prevent you from providing help.

In an emergency situation, ensuring safety may involve looking for dangers such as traffic, fire, electrical hazards, or even aggressive individuals. Only when you are certain that the area is secure should you proceed with assisting the person in need. This creates a stable environment for both the rescuer and the person requiring assistance, thus maximizing the chance of a successful intervention.

The other options, while important in different contexts, do not represent an immediate priority. For instance, checking if the person is breathing can come after confirming the scene's safety, and the arrival of emergency services is part of the broader scope of response but not a prerequisite for initiating CPR.