Answer: The community is supportive, kind, and tries to help people.
Explanation:
The sentence that contains an error in parallel structure is the community is supportive, kind, and tries to help people.
This is because the first two items that are in the predicate are adjectives. The words are supportive,and kind while the third item isn't a predicate but rather is a verb that is modified by an infinitive phrase. The word here is "tries to help people".
