Which of the following is an example of a final stable syllable?

A final stable syllable refers to a specific sound pattern that occurs at the end of a word, typically composed of a consonant followed by the /əl/ or /ən/ sound, often represented by endings like -ble, -tle, or -dle.

In the case of "button," the ending "-ton" incorporates the unstable syllable rule as it includes a vowel sound that doesn’t end in a consonant-vowel combination. "Napkin" ends with "-kin," which does not constitute a final stable syllable but rather maintains a more transient sound before the ending consonant. "Shake" also does not represent a final stable syllable; it ends directly with a consonant and has no additional stable vowel sounds following it.

"Sandle," while not a standard spelling for "sandal," does suggest a final stable syllable due to the presence of the "-dle" ending, which creates a predictable sound pattern and fits the criteria for final stable syllables. This form of syllable gives words like "sandal" or "candle" their distinct, identifiable endings, which classifies it as the appropriate answer in this context.