Hello, can someone please help me with this!

The election of Hayes as president.

Explanation:

During the 1877 presidential election, Democrat Samuel J. Tilden feared most of the popular vote, but lost the election because the electoral college elected Republican Rutherford B. Hayes. Obviously, the Democrats did not accept this decision, since it removed the electoral power of the people. To solve this problem, the 1877 compromise was created, in which Hayes was elected, but he undertook to finalize the reconstruction of the south, which was the main campaign promise of the Democrats.

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.