Parallel construction means that you

Abegin each paragraph of your essay in the same way.
Brepeat the first paragraph of your essay as the last paragraph.
Cuse the same grammatical construction in all similar headings throughout an outline.
Dgive both sides of the argument in your essay.

Verified Answer :

Parallel construction means using the same grammatical construction in two or more sentences, especially for the same effect. A good example is provided in the option   C: use the same grammatical construction in all similar headings throughout an outline.