Final answer:
In Spanish, tú is the subject of the sentence and the verb form that agrees with it is 'eres', meaning 'are'.
Step-by-step explanation:
Tú is the subject of the sentence. In Spanish, tú is the informal second person singular pronoun, equivalent to the English pronoun 'you'. The verb form that agrees with tú is eres, which means 'are'.
Learn more about Subject pronouns in Spanish