Final answer:
The incorrect word in the sentence is 'laid.' The correct word should be 'lay.'
Step-by-step explanation:
The incorrect word in the sentence is 'laid.' The correct word should be 'lay.' In this context, 'lay' is the past tense of the verb 'lie,' which means to recline or rest in a horizontal position. 'Laid' is the past tense of the verb 'lay,' which means to put or place something in a particular position. So, the correct sentence should be: 'After Emily took a relaxing bath and had a cup of hot cocoa, she lay down in bed and immediately fell into a deep slumber.'
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