How does the technique for delivering ventilations differ among adults, children, and infants?

The technique for delivering ventilations during Basic Life Support is fundamentally similar across all age groups with respect to the primary goal, which is to provide effective breaths to maintain oxygenation. In practice, this involves a seal over the mouth and nose in infants, while for children and adults, the lips seal around the mouth. The basic mechanics—having an adequate seal, tilting the head back to open the airway, and giving breaths at a rate that ensures effective ventilation—remain consistent.

While there are variations in the volume of breaths and the pressure applied, the core method of providing rescue breaths does not change significantly among adults, children, and infants. Therefore, the correct understanding is that the technique remains the same, focusing on maintaining a clear airway and delivering sufficient breaths for the individual's size and age. Other options suggest variations that don't accurately reflect the uniform approach required for administering rescue breaths in all three groups.