Theme is not
related to the motifs that occur in a story
the central message revealed through the story
the moral of a story
advanced by the narrator's tone

The right answer is D. Advanced by the narrator's tone

The theme is a term or short expression that briefly presents the subject of a text, often determined by an abstract name. It corresponds to the dominant thought that an author develops in a work and around which an action is organized rather than theoretical reflections.

the answer should be d) he was one of those young thousands who greeted the war with a certain amount of relief, welcoming the liberation from webs of tangled emotion" since it is the best option because it shows his desire to free himself. 

hope this answer you! have a great day.

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.