What unusual action did Duane take regarding Mrs. Starch's pencil?

Duane's action of chewing up Mrs. Starch's pencil is notable because it reflects not only a disruptive behavior in a classroom setting but also a unique and perhaps impulsive response to a situation. Chewing on a pencil is often associated with restlessness or anxiety, signaling a lack of focus or discontent. This choice emphasizes character behavior, showcasing Duane's disregard for classroom norms and signals a possible tension between student and teacher.

Options such as sharpening the pencil, throwing it away, or giving it back involve more conventional interactions with a classroom object, which do not convey the same level of unusual behavior as chewing it. Chewing the pencil stands out as an action that is unexpected and illustrative of a particular personality trait or situation.