Final answer:
The best approach to determining the chief complaint for an adolescent's health history is by obtaining the adolescent's perspective on health concerns.
Step-by-step explanation:
The best approach to determine the chief complaint when taking a health history of an adolescent is by obtaining the adolescent's perspective on health concerns. This is important because the adolescent may have different concerns or experiences compared to their parents. By actively involving the adolescent in the conversation and allowing them to express their perspective, the nurse can gather more accurate and relevant information regarding the chief complaint.