Final answer:Depression, although often co-existing with anxiety disorders, is not considered an anxiety disorder but rather a mood disorder. Anxiety disorders, which include specific phobia, social phobia, and panic disorder, involve excessive and persistent fear and anxiety.Explanation:The question asks which of the following is not classified as ananxiety disorder: a. specific phobia. b. panic disorder. c. depression. d. social phobia. The correct choice would be c. depression. Although depression can occur with anxiety disorders, it is technically classified as a mood disorder, not an anxiety disorder.Anxiety disorders, such as specific phobia, panic disorder, and social phobia, are characterized by excessive and persistent fear and anxiety. They cause considerable distress and can lead to disturbances in behavior. It is estimated that approximately 25%-30% of the U.S. population meets the criteria for at least one anxiety disorder during their lifetime.A specific phobia involves excessive, distressing, and persistent fear or anxiety about a specific object or situation. Panic disorder is characterized by the occurrence of panic attacks, while social phobia (also known as social anxiety disorder) involves extreme and persistent fear, anxiety, and avoidance of social situations where one could potentially be evaluated negatively by others.Learn more aboutAnxiety Disordershere:brainly.com/question/30007128#SPJ11...

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