Final answer:
The appropriate word to fill in the blank is 'les'
Step-by-step explanation:
The appropriate word to fill in the blank in the sentence is les.
The sentence translates to 'I always give my cousins many Christmas presents.'
In Spanish, when referring to multiple people indirectly, the pronoun 'les' is used. In this sentence, 'les' is used to indicate that the presents are being given to the cousins.
Learn more about Spanish pronouns