It symbolizes him looking across looking at her dock.
The answer is, or should be, B. An 'adjective phrase' (or adjectival phrase) is a phrasewhose head word is an adjective, e.g. fond of steak, very happy, quite upset about it, etc.
Atticus Finch and Boo Radley. These men to me are considered mockingbirds. When thinking of mockingbirds I get a sense of innocence. Atticus is above all the other adults around him and he is kindly defending and respecting Boo as he does everyone else. Boo Radley is also a mockingbird because he was wrongly accused of sexual assault even though knowing his character he didn’t do it. His testimony was very powerful and eye opening.