Walt Whitman frequently uses the poetic device of personification in his poetry to enhance emotional depth. Other options like meter, stressed syllables, and rhyme schemes are less applicable to his free verse style. Whitman's innovative approach focuses on the rhythm of speech rather than traditional constraints. ;
Walt Whitman often uses personification in his poetry to emphasize ideas by giving human traits to non-human entities. This technique enhances the emotional depth and connection within his themes. Therefore, the best answer is D. Personification.
;