What option must be selected to search for grammatical variations of a word in the dictionary search?

To search for grammatical variations of a word in the dictionary search, selecting the option for enabling stemming is essential. Stemming is a linguistic process that reduces words to their base or root form. For instance, this would mean that variations like "running," "ran," and "runs" would all relate back to the root form "run."

In the context of a dictionary search, enabling stemming allows the system to recognize and retrieve results that include all possible grammatical forms of a given word. This enhances the search functionality by ensuring that users do not miss relevant content due to variations in word endings.

Other options, while related to search functionalities, serve different purposes. For instance, enabling variation might not specifically address grammatical variations, and enabling fuzziness pertains more to handling spelling mistakes or similar-sounding words rather than morphological variations. Expansion, on the other hand, generally refers to broadening searches to include synonyms or related terms rather than focusing on the grammatical aspects of a word. Therefore, the most effective choice for identifying grammatical variations is to enable stemming.