How is puberty defined for EMS purposes?

For EMS purposes, puberty is defined as the physical changes that occur in both males and females, marking the transition from childhood to adulthood. The correct choice highlights specific indicators of puberty: breast development in females and the growth of facial hair in males. These physical changes are significant markers of sexual maturation and are essential for EMS personnel to understand when assessing and interacting with adolescents. Recognizing these signs can aid in understanding a patient's developmental stage, which can be critical in providing appropriate medical care and communication. Moreover, while other options touch on aspects of puberty or growth patterns, they do not capture the specific physiological indicators that mark the beginning of adult sexual characteristics as effectively as the correct answer does.