Final answer:
Option 4 demonstrates parallel structure by using a consistent verb tense and form, making it the correctly structured sentence.
Step-by-step explanation:
The sentence with parallel structure is: Option 4: Wiesel explains why survivors feel it's necessary to recount every memory, describe every encounter, and record every detail of their experience.
Parallel structure, or parallelism, involves using the same pattern of words to show that two or more ideas have the same level of importance. This is often achieved by keeping the verbs in the same tense and form. In Option 4, the verbs 'recount,' 'describe,' and 'record' are all in the simple present tense and infinitive form, which maintains consistency and balance in the sentence structure.