Which of the following pairs of words illustrates a vowel pair?

The correct answer illustrates a vowel pair, which refers to a specific combination of vowels occurring within a word, particularly when the vowels together create a distinctive sound. In this case, the words "shake" and "shine" both contain the vowel pair "ai".

In "shake," the "a" and "e" work together to create the long "a" sound, while in "shine," the "i" and "e" form a vowel combination that produces the long "i" sound. These vowel combinations are essential in phonics, where understanding how vowel pairs function helps in deciphering the pronunciation and meaning of words.

The other options do not illustrate vowel pairs effectively. "Doctor" and "dollar" primarily emphasize consonants and do not exhibit a notable vowel pairing. Similarly, "cable" contains the vowel pair "a" and "e," but "sandle" is not a standard word and likely refers to "sandal," which disrupts the ideal pairing. Lastly, "napkin" and "button" do not present a clear vowel pair as the vowels do not combine to produce a distinct sound.