6. which advertising slogan uses alliteration? the finest berries bite into a big berry blast berry large size, very nice flavor berries are for intelligent folks

Alliteration is a literary device which is a repetition of the consonants in a row, sound stressing syllable of a phrase.

Alliteration is a literary device which is used by the writer to emphasize something that he/she wants to express. To spot an alliteration, it begins with the same consonant sound.

Advertising slogan which uses alliteration is the Finest Berries Bite Into a Big Berry Blast Berry.

Herein. the repetition of consonant sound 'B' emphasizes the literary device alliteration.