The article about native american folklore is fascinating.
bolded words are "about native american"

what kind of phrase are the bolded words?

a. gerund phrase
b. verb phrase
c. adjective phrase
d. adverb phrase

 The bolded words form an (C.) adjective phrase.

Explanation: An adjective phrase is a group of two or more words that includes an adjective and modifies a noun that is usually placed before the phrase. In the sentence provided, "about Native American folklore" is an adjective phrase because it is modifying the noun "article" and providing more information about it. Moreover, it is made up of the adjective "Native American", which has been used to premodify the noun "folklore".

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.

what are the phrases to choose from?