In taxonomy, what do "see also terms" refer to?

In taxonomy, "see also terms" refer to related but not identical terms that help provide context or additional information related to a preferred term. These terms serve as references that guide users to other relevant concepts or categories that may not be direct synonyms but are connected in some way. For example, if a user is searching for information on a specific species, a "see also" reference might direct them to a different species that shares similar characteristics or has a related classification. This enhances the comprehensiveness of the taxonomy by allowing users to explore related topics more effectively.

In contrast, the other options do not accurately capture the purpose of "see also terms." Identical terms would simply point to the same entity and not provide additional insights, while completely unrelated terms would not serve any useful function within the taxonomy structure. Term definitions in another language do not pertain to the concept of relationship between terms and thus fall outside the scope of "see also" references.