Part of Speech Example
When he reached the castle wall, he slowly climbed the
ladder.
He climbed up the ladder to get into the attic.
Do you believe everything people tell you?
The mountaintops are covered in sparkling waterfalls.
Ouch! That really hurt.
She lived in a spacious cabin by the entrance to the
mountain trail.
I don't really like spaghetti, but I could eat lasagna any
day.
pronoun
verb
adjective
adverb
interjection
preposition
conjunction

Slowly: adverb because it describes a verb

He: pronoun

Believe: verb because it is an action

Ouch: interjection because it's an abrupt remark

by: preposition because it shows location

But: Conjunction because it connects two causes

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.

and your question what topic are you in trouble with?