Final answer:
The correct conjugation of the verb estar to complete the sentence 'Yo _____ contenta.' is 'estoy'.
Step-by-step explanation:
The correct conjugation of the verb estar to complete the sentence 'Yo _____ contenta.' is estoy. 'Estoy' is the first-person singular form of the verb estar, which means 'to be' in English. In this sentence, it is used to express a temporary state or feeling, indicating that 'I am happy' at that moment.
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