Final answer:
CPR differs slightly in adults versus children and infants because of body weight and size factors.
Step-by-step explanation:
CPR differs slightly in adults versus children and infants because of body weight and size factors. Adult CPR is typically performed with two hands in the center of the chest, while child CPR is typically performed with one or two hands in the center of the chest. Infant CPR is performed with two fingers in the center of the chest. The compression depth and rate also vary depending on the age group.