Analyzing Diction and Syntax in Mood Creation

Read the following excerpt from a fictional narrative:

"The storm raged outside, unleashing torrents of rain that lashed against the windows. Inside, the dimly lit room was strewn with books and remnants of forgotten dreams. There was an unmistakable tension in the air, like the charged atmosphere before a thunderclap, stifling yet electric, as if the walls themselves held their breath."

In this excerpt, which of the following options best describes the writer's use of diction and syntax to convey mood?