Final answer:
Leita is unhappy with Mr. Peters due to feelings of isolation and yearning for her previous life, similar to Minnie Foster's transformation from a vibrant choir singer to a lonely, solemn figure after her marriage.
Step-by-step explanation:
In “The Third Wish”, we can infer that Leita is unhappy living with Mr. Peters because she feels out of place and longs for her previous life. In the story, her loneliness and unhappiness stem from not having a natural connection to the human world, which Mr. Peters belongs to. Her discomfort is similar to Minnie Foster's transformation after marrying John Wright, as depicted in the passages from LibreTexts. Minnie, once lively and part of the community choir, becomes isolated and forlorn after marriage, changing from a birdlike figure of joy to one of solemnity and confinement. Similarly, Leita, despite the kindness and opportunities provided by Mr. Peters, feels a deep sense of disconnection and isolation, prompting her to miss her sister Wynne and her former life.