Answer: C) A theme focuses on what the story reveals about human nature.
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. From the given options, the one that represents the function of a theme in a story, is the corresponding to option C: A theme focuses on what the story reveals about human nature.
