“No. Wrong word, Jonas thought. Frightened meant that deep, sickening feeling of something terrible about to happen.”
Why did the author include this sentence?

The author includes this to create a mood to the story.

Explanation:

"Frightened meant that deep, sickening feeling of something terrible about to happen." That creates a mood.

Hope this helps! :)

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.