Which element in a story can be helpful in understanding the story's theme A. Research
B. Personal opinion
C. Preexisting knowledge
D. Characterization

D

Explanation:

Characterisation is a major element used in writing novels. The essence of this is to portray different personalities which in the end would culminate to us understanding what the story is all about. Remember what the story is all about is regarded as it's theme.

anxious,the clues in the question suggest he was embarrassed and anxious about boo radley.