Final answer:
The verb that completes the sentence is 'está' and it means 'to be' in Spanish.
Step-by-step explanation:
To complete the sentence 'Elena ___ en la Habana', the correct verb is 'está'.
This is because 'está' is the third person singular form of the verb 'estar', which means 'to be' in Spanish. It is used to express a temporary or current state or location.
For example, if Elena is currently in Havana, we would say 'Elena está en la Habana'.
Learn more about Spanish verbs