According to the context, the most appropriate Spanish word to complete the sentence is "aquéllas".
What are demonstrative adjectives?
In Spanish, they are words that establish a close relationship with the noun and agree in number and gender with it.
In the sentence "Estas ropas son bonitas, pero aquéllas no son muy buenas", "aquéllas" is the correct option since it is a plural feminine demonstrative adjective.
Therefore, we can conclude that according to the context, the most appropriate Spanish word to complete the sentence is "aquéllas".
Learn more about demonstrative adjectives here: https://brainly.com/question/11048481
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