Complementary admission for teachers and students . what's wrong with this sentence

Which of the following lines contains a simile? you wet brown bag of a womani think that i shall never see/ a poem lovely as a treebecause i could not stop for death/ he kindly stopped for mea little learning is a dangerous thing

Who dies in a duel because of his pride and his anger

In this excerpt , mr.stonecrop is compared to a mountain. how does this description relates to mr.stoncrops roll in the main conflict of the story