WHO EVER HELPS ME FIRST GETS BRAINLESTHow can decomposing a parallelogram and composing it as
another shape help in understanding the formula for the area of
a parallelogram?

You can compose, or create, a parallelogram (a four-sided shape with two sets of opposite, parallel sides) using two shapes, such as triangles or squares. You can decompose, or take apart, a parallelogram by dividing it from opposite corners, either vertically or horizontally.

To find the surface area is basically the sum of all the areas of all the shapes that cover the surface of the object. So your answer is going to be C. 1018 in^2. I hope this helped. :)