When assonance always uses a when creating similar sounds?

Assonance uses vowels to create similar sounds, not consonants.

For example, in the phrase "the sea shells shine", the repetition of the s sound is called consonance, not assonance.

Here are some examples of assonance:

* "The old oak outside the office". (Notice the repetition of the short "o" sound.)

* "The air above and the earth enclosed" (The long "a" and short "e" sounds are repeated.)

Remember, assonance is the repetition of vowel sounds, while consonance is the repetition of consonant sounds.