Final answer:
The subject of this question is Spanish and the correct word to fill in the blank is 'pasatiempo'.
Step-by-step explanation:
The subject of this question is Spanish, as indicated by the sentence written in Spanish and the given options which include Spanish words. The sentence translates to: 'In my free time, I like to play the guitar, read, and write poems.' In this context, 'pasatiempo' is the correct word to fill in the blank, which means 'pastime' or 'hobby' in English.
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