Final answer:
In William Shakespeare's Sonnet 93, the tone is mysterious as the narrator uses a metaphor of Eve's apple to contrast external beauty with inner character, indicating deceptive appearances.
Step-by-step explanation:
The tone of the poem in the excerpt from William Shakespeare's Sonnet 93 can be described as mysterious. This is because the speaker, who is the narrator, reflects on outward appearances versus inner reality in a way that hints at hidden depths or secrets. The narrator uses the metaphor of Eve's apple, which symbolizes the potential for deception concealed in attractive things. The poem contrasts the lady's external beauty with her inner character, suggesting that her appearance does not necessarily reflect her true nature or virtues.