Explanation: In literature, the theme is the underlying message of a story, it is what critical belief about life is the author trying to convey in the writing of a novel, play, short story or poem. Usually this belief, or idea, is universal and transcends cultural barriers. The theme of the poem "Dreams" by Langston Hughes is that dreams make people happy, we can know that, because he compares a life without dreams to a bird that cannot fly and to a barren field frozen with snow.
