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.
Contrasting colors. You focus on the person with the umbrella because it's a black figure against a white background.
Yeah somewhat some pieces are nostalgic too!!
You can compare emotion and message.