Final answer:
The subject pronoun to address a peer or friend in Spanish is 'tú'.
Step-by-step explanation:
The subject pronoun that you would use to address a peer or a friend in Spanish is tú. It is the informal second person singular pronoun. For example, you would say: Tú eres de Caracas, ¿no? which translates to 'You are from Caracas, right?'
Learn more about subject pronoun in Spanish