What is the purpose of an exposition

Read the stanza below from the poem “tattoo” by gregg shapiro and answer the question that follows. if i could trade places with him i would pad the rest of his days wrap him in gauze and velvet absorb the shocks and treat his wounds i would scrub the numbers from his flesh extinguish the fire and give him back his life what does shapiro use to create the conceit in the lines above? a) he carries one line of poetry onto the next. b) he paints vivid word pictures that trigger the imagination by appealing to the five senses. c) he directly expresses a metaphor using like, as, or than. d) he uses physical protection to represent emotional protection.