Which feature allows users to check grammatical errors in Word documents?

The Spelling and Grammar Check feature in Word documents is designed specifically to help users identify and correct grammatical errors, as well as misspelled words. When a user runs this feature, it scans the text for any grammatical mistakes, including issues like subject-verb agreement and sentence structure, and offers suggestions for corrections. This tool is essential for ensuring that written content is clear and adheres to standard language conventions, making it a critical asset for effective communication in professional and academic settings.

The other options serve different purposes; a Thesaurus provides synonyms and antonyms for word choices, Word Count informs users about the number of words in a document, and AutoCorrect automatically corrects common typing errors as they occur, but it does not specifically address grammatical issues within the text. Thus, the Spelling and Grammar Check feature is the most appropriate choice for checking grammatical errors.