Red Cross Adult, Child and Baby First Aid/CPR/AED Practice Test

When giving breaths during CPR, it is essential to observe that the chest begins to rise. This indicates that air is being effectively delivered to the lungs, which is crucial for providing oxygen to the body. Proper ventilation is vital in resuscitation efforts, as it allows oxygen to enter the bloodstream and reach vital organs. A visible rise in the chest confirms that you are delivering sufficient breaths, which can significantly improve the chances of survival for the person receiving CPR.

While the other options might suggest various movements of the body, they do not serve as indicators of successful breaths during CPR. For instance, an arching back or coughing is not relevant to the effectiveness of the breaths given. The movement of the arms is also unrelated to the indication of successful ventilation. Thus, the primary focus during this part of CPR is the observable rise of the chest, which demonstrates that the breaths are being properly administered.