SAT Question f570cece: Form Structure And Sense answer and explanation

English - Form Structure And Sense - Plural And Possessive Nouns
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Both Arteaga, in the state of Coahuila, and Lagos de Moreno, in the state of Jalisco, have been designated by Mexico as pueblos mágicos (magical villages) to celebrate these ______ natural beauty and unique cultural traditions.
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Difficulty:Medium
Which choice completes the text so that it conforms to the conventions of Standard English?