Based on the text, why are deep-sea monsters the stuff of nightmares?
their appearance and limited access to them makes them scarier.
humans dislike the things they cannot see and touch in person.
there is a lack of evidence of their actual existence in the ocean.
scientists can only guess what some of them look like.

faulty parallelism is a grammar construction where there is no balance in the parts of a sentence they have a similar meaning but the grammar structure is not equivalent.

the correct version of this faulty parallelism in the sentence is:

jefferson wrote the declaration of independence, and he was the nation's third president.

the problem with the first version is that the sentence:

"jefferson was both the writer of the declaration of independence"

presents jefferson as both a subject and an agent for the verb "write" because if he was "the writer" then the declaration of independence was written by him, besides that fact, the sentence presents a dependent clause.

while the second sentence:

he was the nation's third president.

presents a basic subject+verb+object structure

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in both sentences:

jefferson wrote the declaration of independence, and he was the nation third president.

artists: xxxtentacion, lil baby, drake, post malone, khalid, bryson tiller, jermih, j. cole, russ, the weeknd, travis scott, kendrik lamar