In this analogy, 'DIARIO is to HEMEROTECA' illustrates a relationship similar to 'LIBRO is to BIBLIOTECA', emphasizing the connection between newspaper and library.
The word that best completes the analogy is DIARIO is to HEMEROTECA.
Just as a book is found in a library (biblioteca), a newspaper (diario) is typically found in a hemeroteca, which is a place where newspapers are stored and archived.
Therefore, the correct answer to the analogy is C. Hemeroteca.
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