Correct!

At an incident, a casualty is not breathing. What should you do while helping them to start breathing again?

Put their arms across their chest
Shake them firmly
Roll them onto their side
Open their airway
Correct answer

DVSA theory test explanation

It's important to make sure that the airway is open before you start cardiopulmonary resuscitation (CPR). To open the casualty's airway, place your fingers under their chin and lift it forward.