That sentence is an example of parallel structure.
When there is repetition of a specific grammatical form in a sentence, parallelism or a parallel structure is produced. This occurs when you mantain the same pattern for every compared word or idea in your construction. This makes the idea easier to follow by the reader.
Answer:
They should be used sparingly throughout the essay. If something is important enough to be in the sentence, it should be fully part of it. As always, make sure to check with your teacher or professor.
Hope this helps!
Answer:
First one Correct sentence
Second To stop or Hold back