What are three purposes of dialogue

Dialogue is one of the few ways that a playwright has to communicate important things to the audience through his/her characters. So what is the purpose of dialogue in a play? Dialogue is not simply conversation between characters. i dont know if this would help but hopefully you get a better understanding of dialogue

the correct answer is   d. a picture depicting people applauding a country's leader.

where is the writing? (so i can answer)