Final answer:
С Eliza empties her mind and sees the letters come up as images. The most important detail to include in a summary of the story is Eliza empties her mind and sees the letters come up as images.
Step-by-step explanation:
The most important detail to include in a summary of the story would be Eliza empties her mind and sees the letters come up as images. This detail shows a unique technique that Eliza uses during the spelling bee, which sets her apart and offers insight into her approach. Including this detail in the summary would provide a key element of the story and help readers understand Eliza's strategy.