Answer & Explanation:
The author chooses not to use standard English in the character's dialogue. Dialect is the way a person pronounces or speaks a language. Often dialects are different based on the demographics of a person. In this dialogue, the dialect can suggest that the speaker is uneducated.
Assonance is the repetition of vowel sounds. Foreshadowing is a hint at a future event. Symbolism is when a concrete object represents and idea.
So therefore, the literary device that the passage employs is the dialect.