How do you expect someone to answer this without the passages you refer to?…
Answer:
Keanon loves biking, snowboarding, and hiking.
Explanation:
This sentence contains correct parallel structure because it uses three <u>identical</u> grammatical forms (gerunds) as objects of the verb 'loves': biking, snowboarding, and hiking. That's parallelism.
The other sentences use <u>different</u> grammatical forms (gerunds and infinitives) as objects and, therefore, cannot be considered parallel in structure.
