For a child or infant, how many breaths should be given every three seconds for a total of 40 cycles?

In the context of giving rescue breaths to a child or infant, the recommended approach is to provide one breath every three seconds. This frequency is based on guidelines that emphasize the importance of adequate ventilation while avoiding excessive breaths that could lead to complications, such as overinflation of the lungs.

When considering a total of 40 cycles, where each cycle consists of delivering one breath every three seconds, it allows for a consistent and controlled way to provide life-saving breaths without overwhelming the child or infant's respiratory system.

The other options suggest providing multiple breaths within that three-second duration, which is not advised in this specific situation. Each rescue breath should be delivered slowly and effectively to ensure proper oxygenation without causing harm. Therefore, the correct procedure is to administer one breath every three seconds for a total of 40 cycles, aligning with established CPR protocols for children and infants.