Answer:
Realism.
Step-by-step explanation:
Hamlin Garland's 'The Return of Private' would be categorized as a work of 'realism' as it intends to portray the real life subjects with a touch of authenticity. It intends to portray the real life scenario of the time and the trauma and suffering faced by the people after the Civil War.
The key concern was to depict the complexity and conflicts(internally and externally) that people were facing in their daily-life as a consequence to the war. It displays the exhausting effects of the war on 'private Edward Smith's personal life' and his family's well-being that reflects the impact of social trauma on the psychological and personal aspects of people's lives that gives a 'realist touch' to the work. Thus, it would be appropriately be classified as a 'realist' text.