What is the name of the technique used to open the airway of an unresponsive, non-breathing guest?

The correct answer is CPR and ventilations and Rescue breathing. CPR or also known as Cardiopulmonary resuscitation is a technique used for emergencies in which is a way of providing basic life support after the individual has stopped breathing and after the individual’s heart has stopped beating. Rescue breathe on the other hand is a way of providing airway to the individual who has stopped breathing to provide oxygen which is also considered as a basic life support.