Answer:
Explanation:Among the possible themes provided, the best one for the story of unreturned love would be "Sentimental love." This theme focuses on the emotions and feelings associated with unrequited love, highlighting the heartache, longing, and emotional turmoil experienced by the character. It delves into the complexities of unreturned love and explores the impact it has on the individual. By choosing this theme, the story can delve deeper into the emotional journey of the character and provide a more nuanced exploration of unrequited love.