Which of the following resources will best help a student to vary word choice during the revision stage of a composition?

A grammar handbook focuses primarily on the rules and structures of language, such as sentence construction, punctuation, and syntax. While this resource is essential for ensuring grammatical correctness, it does not assist in varying word choice, which is critical during the revision process.

A dictionary provides definitions, pronunciations, and usage examples of words. Though it can help clarify the meaning of a word, it does not specifically offer synonyms or alternatives that can help a student vary their word choice during revisions. Thus, it is less effective for this particular purpose compared to a thesaurus.

An MLA handbook outlines the guidelines for writing and formatting academic papers, particularly in the context of the Modern Language Association's standards. While it is a valuable resource for citation and formatting, it does not address the need for varying vocabulary in writing, making it unsuitable for this aspect of composition revision.