NARRATOR: Since September, their days had passed in nearly identical fashion. James and Constance had fought the land, fought the weather, fought the dangers of the coyotes who ravaged their flocks. They fought for warmth, for food, for hope that life on the desolate prairie would become the life of plenty they both wanted. Their dreams had sparked them to leave behind the safety of Connecticut, but now they felt they had been duped, led into a trap from which they would never emerge. What kind of exposition does the playwright use in this instance?