Final answer:
The repeated comparison of Johnsy and the leaf creates the effect of symbolism, highlighting the fragile connection between her life and the leaf's existence.
Step-by-step explanation:
The repeated comparison of Johnsy and the leaf in the story creates the effect of symbolism. This comparison creates a symbolic connection between the physical state of Johnsy and the fate of the leaf, suggesting that Johnsy's life and health are as tenuous as the leaf's existence. By aligning Johnsy's well-being with the leaf, the author is able to convey deeper meanings about life, mortality, and hope. It is not an example of irony or foreshadowing, and it certainly does not represent an instance of alliteration, which is a literary device involving the repetition of consonant sounds at the beginning of words. The symbolism through repetition emphasizes the parallels between the character's life and the natural element, enhancing the emotional impact of the story on the reader.