What is an example of a mood disorder?

A mood disorder is characterized by significant changes in mood or emotional state that disrupt daily functioning. Major Depressive Disorder and Bipolar Disorder are both recognized as mood disorders. Major Depressive Disorder involves persistent feelings of sadness or a lack of interest in activities, affecting how one feels, thinks, and handles daily activities. Bipolar Disorder is characterized by periods of depression alternating with episodes of mania or hypomania, indicating fluctuations in mood that can significantly impact one's life.

Other conditions listed, such as Obsessive-Compulsive Disorder, Adjustment Disorder, and Generalized Anxiety Disorder, fall outside the category of mood disorders. Obsessive-Compulsive Disorder is primarily an anxiety disorder marked by compulsive behaviors and intrusive thoughts. Adjustment Disorder involves a response to a specific stressor that leads to emotional or behavioral symptoms but does not fit the criteria for mood disorders. Generalized Anxiety Disorder is also classified under anxiety disorders and is marked by excessive worry and anxiety about various aspects of daily life. Thus, only Major Depressive Disorder and Bipolar Disorder directly pertain to the mood disorder classification, making the selected answer appropriate.