Question

a first - aid procedure that combines mouth - to - mouth breathing with chest compressions.
○ aed
○ cardio people re - alive
○ rescue breaths
○ cardiopulmonary resuscitation

Explanation:

Cardiopulmonary resuscitation (CPR) combines mouth - to - mouth breathing and chest compressions to maintain blood circulation and oxygen supply. AED is an automated external defibrillator, rescue breaths are just the breathing part, and "Cardio people re - alive" is not a standard term.

Answer:

D. Cardiopulmonary resuscitation