17. why would you use tú when speaking to a classmate? you would use tú when speaking to a classmate because…

Brief Explanations:

In Spanish, "tú" is an informal second - person singular pronoun. When speaking to a classmate, the relationship is usually informal, so "tú" is appropriate as it indicates a close, non - formal connection.

Answer:

You would use "tú" when speaking to a classmate because it is the informal second - person singular pronoun in Spanish, and the relationship with a classmate is typically informal.