Final answer:
The nurse should identify the sound as wheezing.
Step-by-step explanation:
In this scenario, the nurse is auscultating the lungs of an adolescent who is experiencing dyspnea, which is difficulty breathing. The nurse should identify the sound as wheezing. Wheezing is a high-pitched, whistling sound heard during expiration that is caused by narrowed airways, often as a result of conditions like asthma or bronchitis.