A psychologist is given a referral for treatment of an anorexic sixteen-year-old female. During the course of an individual session, it is discovered there are stressors at home that may be contributing to the adolescent’s problems. The female’s sister is extremely intelligent and highly involved in extracurricular activities. Recently, she was nominated homecoming queen of her high school. The sixteen year-old struggles in school, has a passive personality, and enjoys being alone. Since the parents are busy attending functions with the other daughter, they barely have time to notice her problems. The psychologist recommends family therapy for what reason?