Question

Which sentence demonstrates an error in parallel structure?

Answer 1

Which sentence demonstrates an error in parallel structure?
Astronauts must be able to both perform complex calculations and maintain top physical condition.
Applicants for the job at the municipal court must have earned either a high school diploma or a GED equivalency.
Stephen Hawking is known not only for his achievements as a physicist but also because he bravely lives with ALS.
Neither studying for a test nor doing your household chores sounds like a fun way to spend your weekend.

Answer 2

@Cookie_2046

Answer 3

Parallel structure means using the same pattern of words to show that two or more ideas have the same level of importance. This can happen at the word, phrase, or clause level. The usual way to join parallel structures is with the use of coordinating conjunctions such as "and" or "or."

From: https://owl.english.purdue.edu/owl/resource/623/01/