I believe you’re talking about a prepositional phrase. Ex: On the table, in the kitchen.
Parallel grammatical construction form means that each part of a sentence uses the same grammatical structure. It is also known as a balanced structure within one or more sentences of similar phrases or clauses having the same grammatical structure.
These are the Different kinds of parallel structures that we can make:
Synonymous parallel structures occur when the different constructing clauses of a sentence have a similar meaning.
Antithetical parallel structures occur when the different constructing clauses of a sentence have an opposite meaning.
Climatic parallel structures occur when a part of a clause is repeated in subsequent clauses within the sentence.
Emblematic parallelism is etymologically derived from the word emblem, which means "symbol." Parallelism occurs in poetry when lines are intentionally placed together to create comparison, contrast, or enhancement of a meaning.
Synthetic parallelism involves the completion or expansion of the idea of the first part in the second part.
The correct Revision of the faulty parallelism in the sentence is:
C. Reading good books can help you discover <u><em>who you are and what you value. </em></u>
The underlined section is where we find the parallel structure:
who<u> you are</u> = what <u>you value</u>
