The stranger gains Elisa's trust by showing interest in her chrysanthemums.
During the conversation at the fence, the stranger gains Elisa's trust by showing an interest in her chrysanthemums. By acknowledging and appreciating something that is important to Elisa, he establishes a connection with her, making her more open to trusting him.
By engaging with Elisa's passion for her chrysanthemums, the stranger demonstrates a genuine interest in her and her world, thereby earning her trust.
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