Final answer:
The correct conjugation for the present perfect tense in Spanish is 'has vivido'.
Step-by-step explanation:
The correct conjugation for the present perfect tense in Spanish for the sentence 'en una ciudad?' is has vivido. In this case, 'has' is the second-person singular form of the verb 'haber' in the present tense, and 'vivido' is the past participle of the verb 'vivir'.
Learn more about Spanish verb conjugation