Let's break it down. The first part, Visual, is what you see when you look at something, color, arrangement, font, etc... The rhetoric part deals with the persuasion. In conclusion, it's what we see and how we act or think when we see it. It is one's ability to understand what an image is attempting to communicate.
Here is the answer. The sentence from "Their Eyes were Watching God" that contains an example of dialect is this: <span> But Mrs. Turner's shape and features were entirely approved by Mrs. Turner. Hope this answers your question. Have a great day ahead!</span>