Answer:
Systematic desensitization
Explanation:
Systematic desensitization was proposed by Wolpe. It is a behavior modification technique. This technique is used to treat phobia, anxiety, OCD, etc. It is a psychological tool to treat the psychological disorder.
In this technique, the therapist makes a hierarchy list to treat the disorder. The hierarchy has 10 levels. Through this process, a psychotherapist treats a patient.
Thus in the above statement, Julie is suffering fro fear of riding on an elevator. The therapist will make a hierarchy and then make a treatment plan for the patient.