What is the most important step in saving life usually?

The most important step in life saving is to ensure airway patency and provide effective breathing.

- This is achieved through the following basic steps:

- Check the person's responsiveness: Gently shake and shout to the person to see if they are responsive. If they are unresponsive, call for help.

- Open the airway: This can be done by using the head-tilt/chin-lift or jaw-thrust technique.

- Check for breathing: Look, listen and feel for normal breathing for no more than 10 seconds.

- Start CPR: If the person is not breathing or only gasping, start CPR (Cardiopulmonary Resuscitation) immediately. This involves giving chest compressions and rescue breaths.

- Continue CPR: Continue CPR until professional help arrives or the person starts breathing again on their own.

Ensuring adequate oxygen supply to the brain and vital organs is crucial in saving lives. Prompt recognition and response to respiratory emergencies, particularly airway obstruction or cessation of breathing, are essential for preventing serious complications and increasing chances of survival.