A teacher gives a task of dialogue completion to class V students. The role of this task in language learning will be ________

Dialogue completion tasks help learners practice real conversational language through formulaic expressions (greetings, requests, responses, etc.) in authentic communicative contexts. This builds conversational competence by exposing students to natural patterns of interaction. The task is not primarily about teaching grammar structures (option 1) or separating spoken/written forms (option 2), and it certainly is not limited to grammatical error feedback (option 4). The communicative function is the primary pedagogical purpose.