Final answer:
The author's primary goal, supported by detailed descriptive imagery and sensory details, is to create a foreboding atmosphere in the narrative.
Step-by-step explanation:
One of the main purposes of the author, according to the lesson emphasis, is likely D) to create a foreboding atmosphere. This is suggested by the use of descriptive diction and sensory detail that adheres to the 'Editing Focus' of the chapter. The text aims to immerse the reader by describing the moment in great detail, engaging the five senses, and employing metaphors. Indications of a darker tone or mood are found in the mention of a character's furtive glances and the robust but mind-affected appetite during the meal, as well as the somber imagery of the protagonist sitting outside, leaning his head on his hands. The use of imagery—to create the mood, to draw attention to certain elements like cut flowers at a supper, or to contrast the intended purpose of a door with the actual usage—supports this idea.