The automated external defibrillator (AED) should be applied to?

The automated external defibrillator (AED) should be applied to individuals who are unresponsive and not breathing normally, as these signs may indicate a cardiac arrest. It is crucial to ensure the area is safe before applying the AED pads to the person's bare chest, following the device's audio and visual prompts. AEDs are designed for use by both trained and untrained bystanders, making them accessible in emergency situations. Always call emergency services before using an AED.