What is a key difference in performing CPR on an adult compared to a child?

One key difference in performing CPR on an adult compared to a child is that adults require deeper compressions. When performing CPR on adults, it's essential to apply adequate force to create enough depth in chest compressions, typically aiming for a depth of at least 2 inches (5 cm). This depth is crucial for effectively pumping blood to vital organs during cardiac arrest.

In contrast, the depth of chest compressions for children is less than that for adults, generally around 1.5 inches (4 cm), due to the smaller size and different physiology of a child's chest. Understanding this distinction is vital for the effectiveness of CPR, as inadequate compression depth can lead to less effective blood circulation.

The other options do not accurately reflect the differences in CPR techniques between adults and children, emphasizing the importance of appropriate compression depth across the different age groups.