Answer:
"how silver-sweet sound lovers' tongues by night, like softest music to attending ears"
Step-by-step explanation:
This is the phrase that best provides an example of a simile. In this excerpt, the author compares the sound of lovers by night to very soft music. A simile is a direct comparison between two things. Similes require the use of a word such as "like" and "as" that serves to indicate that these things are being compared. In this case, the author's use of the word "like" indicates that the phrase is a simile.