What physical actions are involved in performing CPR?

The correct choice involves chest compressions and rescue breaths, which are essential components of cardiopulmonary resuscitation (CPR). When performing CPR, the goal is to maintain blood circulation and oxygenation in a person who is unresponsive and not breathing.

Chest compressions are crucial because they help to manually pump blood to the heart and brain, providing vital nutrients and oxygen to these organs until more advanced medical help arrives. The recommended technique involves using firm pressure in the center of the chest at a rate of around 100 to 120 compressions per minute.

Rescue breaths are also an important aspect of CPR, especially in cases of cardiac arrest where the heart is not pumping effectively. These breaths help to replenish the oxygen supply in the lungs, which is then delivered to the bloodstream during compressions. The proper ratio of compressions to breaths is typically 30 compressions followed by two rescue breaths, emphasizing the need for a balance of both actions to maximize the chance of survival.

Other options are less effective or incorrect methods. Simply breathing into the patient's mouth does not involve adequate blood circulation, while pumping the patient’s legs or shaking them would not provide the necessary support to maintain circulation and breathing during a critical situation. Thus, the combination of