The purpose of dialogue in a narrative essay is to develop characters by displaying their interactions.There is a lot to be learned from characters when their own words are displayed. Backround, education, social status and more can be examined by some short dialogue in between the lines of a narrative essay.Attitude and mood are also elements which are expanded by the characters by the use of dialogue.
Sorry to bother, but you sent a invalid question, we don't know how to answer this unless you state what we are writing on.
Drama is defined as a story told in action by actors impersonating the characters of the story would be considered as to being true.
I think you forgot to put the picture on?