Answer:
The following sentence has a faulty parallel structure:
His decision to leave alienated him from his family, made his boss angry, and hurts his friends.
Step-by-step explanation:
When writing, parallel structure means using the same pattern of words in order to show that two or more ideas or clauses within a sentence have the same importance. For a parallel structure to be correct, the words should not only match in structure but also in tense. This is why the sentence "his decision to leave alienated him from his family, made his boss angry, and hurts his friends" has a faulty parallel structure, as the verb "hurts" is in the present tense while the rest of the verbs in the sentence are in the past simple.