Why would a poet use imagery in a poem?

What is the difference between a major and a minor character? a major character has a less important story line, while a minor character plays a bigger role in the plot. a major character plays a big role in the plot, while a minor character has a less important story line. a major character has an unimportant story line in the plot. a minor character's story line is as important and developed as the major characters' story lines.

What sign post goes with the quote goodnight goodnight parting is such sweet sorrow. that i shall say goodnight till it be morrow

Which modifier could be used to make a comparison? first identical entirely talented