Answer:
IT'S A.
Explanation: Because an appositive phrase is a noun or noun phrase that renames the noun next to it. And A. is the one that explains about it.
The selection of medium (written version vs. visual image) mostly affects the understanding of a theme. This is because the creator could create a detailed explanation using written medium but not with the visual image medium<span>. But, it all depends on the readers' knowledge to interpret the medium itself.</span>
