Why do poets use similes and metaphors? What effect do they have on the reader?

because Metaphors and similes might also make the reader do some work -- they encourage the audience to use their imagination or even interpret words in their own way. Since metaphors and similes show rather than tell, they invite a reader to paint pictures in his mind.

Explanation:

A broken relationship can be fixed if the right channels of communication are provided. In case the author wants to show his or her friends that there is a possiblility to mend things, the bridge between them would be the best object to simbolize the means to work out the broken relationship. Figuratively, the bridge can create the path which will take each part to the other side to overcome past difficulties. The right option is C.