The correct answer is develop their communicative competency.

Drama refers to the participation of students in playing the role of a character to dramatize a story. It develops observational, social, and imagination skills by involving learners in communication and role play.

Using drama as a teaching tool can significantly enhance students' communicative competencies, including not only verbal communication skills such as speaking and listening, but also non-verbal skills like interpreting body language, facial expressions, and tone of voice.

Through the interactive and immersive nature of drama, students get the opportunity to use language in real-life contexts and practice responding to different situations, making language learning more engaging and meaningful.