Explanation:
Alliteration is a literary device characterized by the repetition of the same initial consonant sound in a sequence of words that are in close proximity to each other. In the given sentence:
| Word | Sound |
|---|---|
| So | /s/ |
| sober | /s/ |
| sometimes | /s/ |
| serious | /s/ |
| Sam | /s/ |
| smiles | /s/ |
| silly | /s/ |
This repetition of the /s/ sound in multiple words qualifies the sentence as an example of alliteration.