Final answer:
Marco might be experiencing dissociative fugue, a condition characterized by temporary amnesia and identity confusion. It is often stress-related and ties into the developmental challenge of identity versus role confusion in adolescence.
Step-by-step explanation:
Marco suddenly wanders away from his home and experiences confusion about his identity. Marco may be experiencing a psychological phenomenon known as dissociative fugue. This is a rare condition, a subset of dissociative disorders, where a person temporarily loses access to their personal memories, sense of identity, and may even establish a new identity. Characteristically, individuals in a fugue state will impulsively wander or travel, sometimes over vast distances. Dissociative fugue can be linked to severe stress, trauma, or other mental health issues. In the psychological development stage known as adolescence, identity is a critical element. During this period, individuals face Erikson's concept of identity versus role confusion, where they may experiment with various personas to see which one aligns best with their true self. Failure to establish a coherent identity during this stage can lead to prolonged states of confusion regarding one's role and purpose in life.