Answer:
"On our vacation we went swimming and hiking, but not the amusement park" uses a correct parallel structure
Step-by-step explanation:
Of the given sentences, the sentence “On our vacation we went swimming and hiking, but not the amusement park.” Primarily explains the parallel structure because the meaning of the sentence given is that the group of persons were performing swimming and hiking with equal importance but visiting the amusement park were not exactly their cup of tea.
This explains that the group gave more importance to swimming and hiking but not to visiting the amusement park. This explains the parallel structure of the sentence.