The correct answer is a story that appeals to the audience.
Writing in formal style is more professional and requires formal, specific and adequate vocabulary. In the case of this sentence, when you use a story that appeals to the audience, it sounds more appropriate to replace for the type of audience that could be Reading it.
The formal style uses longer, more precisely sentences that better approach the topic at hand. The important points need to have an introduction, be more elaborate and have a conclusion.