Education is your passport to a bright future.

(a) Simile

(b) metaphor

(c) onomtopoeia

(b) metaphor

Explanation:

A metaphor is a literary device that makes an implicit comparison between two unrelated things by highlighting the characteristics these share. This is usually a single aspect. In this case, a passport is compared to an education because they both give you an opportunity to reach places that were out of reach to you before. The use of metaphors allows us to better understand the items being discussed.