Concept:A figure of speech where a part represents the whole is called synecdoche.Explanation:In the proverb "Many hands make light work," the word "hands" refers to people or workers.Here, a part of the body (hands) is used to stand for the entire person.This replacement of the whole by one of its parts is the key feature of synecdoche.Thus, the expression uses synecdoche, not zeugma, hyperbole, or metonymy.Answer:D. synecdoche