Question

boom! i could hear the thunder from my office. -boom! is an example of
personification onomatopoeia
simile oxymoron

Explanation:

Onomatopoeia refers to words that imitate sounds. "Boom" imitates the sound of thunder, so it's an example of onomatopoeia. Personification gives human traits to non - human things, simile uses "like" or "as" to compare, and oxymoron is a contradiction in terms. None of these other literary devices fit "Boom" as well as onomatopoeia.

Answer:

Onomatopoeia