Final answer:
The first step in the jaw-thrust-without-head-extension maneuver is to gently lift the chin.
Step-by-step explanation:
The first step in the jaw-thrust-without-head-extension maneuver is to gently lift the chin. This is done by placing the fingers under the angle of the jaw and lifting up. By lifting the chin, the airway is opened and it helps to realign the tongue and prevent it from blocking the airway. It is important to stabilize the head and neck while performing this maneuver to prevent any further injury or movement.