Answer: D. Somber.
Explanation: the mood of a story or a text is a literary element that produces certain feelings in the readers, by using words and descriptions. We can also say that the mood is the emotional setting or atmosphere of the story. In the given passage we can see that the author describes how the wind that came out of the cloud, one night killed Annabel, so for the choice of words and the emotions of the text, we can say that the mood is somber.
