In the final line of the dialogue, the teacher demonstrates which of the following?

Metalinguistic feedback involves providing information about the language itself, such as grammar rules or vocabulary explanations. This type of feedback encourages students to think about their language use but does not involve correcting their speech directly, which is not the focus of the teacher's final line in this scenario.

Peer correction entails students correcting each other's language use, promoting collaborative learning. In this case, the teacher is the one providing the correction, so it does not align with the definition of peer correction, which emphasizes student-to-student interaction rather than teacher-led guidance.

Self correction occurs when a student identifies and corrects their own errors. While self correction can indicate a student's growing language awareness, the teacher's role in the final dialogue is to provide the correct form rather than prompting the student to correct themselves.