Answer:Major depressive disorder
Step-by-step explanation:
Major depressive disorder is a mood disorder that disrupts one's daily activities characterized with depressed moods, constant relay of thoughts in the brain, feelings of worthlessness, and reduced interest in most normal activities e.g social activities etc.
20-year-old Odessa who has been feeling lethargic and worthless for four weeks as observed by Her friends when she no longer shows interest in her normal social activities explains that Odessa is suffering from Major depressive disorder.