Final answer:
A therapist who uses a variety of psychological theories and therapeutic methods is said to be using an eclectic approach.
Step-by-step explanation:
A therapist who uses a variety of psychological theories and therapeutic methods is said to be using an eclectic approach. This means that the therapist draws on different theories and techniques from various psychological perspectives to tailor their treatment to each client's specific needs. For example, they may use elements of client-centered therapy, humanistic approaches, psychoanalytic techniques, and other therapeutic methods depending on the individual's circumstances.