Della's actions of cutting her hair to buy Jim a gift reveals that she is very passionate about this relationship and shows her traits as generous and thoughtful; However it may show her conflicts as an overthinker as she is making a potentially big sacrifice which shows how much she cares about the character Jim and may try to please him at her own cost.
The sentence is "The man drove away angrily" is in a passive voice, because it that sentence has a verb, that is making the verb stand out. Hope this helps:)
