Why is parallel structure an important part of writing? how could the incorrect use of parallel structure negatively impact your writing?

Parallel gramatical structures happen when each part or clause 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 ir 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.

I think the answer for this question is pretty easy to see after reading the information just presented. If you do not write correct and precise parallel structures, first you would not convey the exact meaning you intended; second, you can virtually lose your reader in a sea of tangled ideas.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)