Which of the following relates to visual appeal in advertising?

Visual appeal in advertising is significantly impacted by the color scheme and design. This aspect focuses on how colors, layouts, images, and overall design elements attract attention and convey a message effectively. A well-designed advertisement captures the viewer's eye and can evoke emotions or associations that align with the brand or product being advertised. The successful interplay of colors and design choices can create a memorable visual identity, help differentiate the brand from competitors, and ultimately influence consumer behavior.

Other elements like content length and delivery method, while important, do not directly contribute to visual appeal. Content length pertains to word count and clarity, delivery method refers to how the ad is presented (e.g., online, print), and audience feedback is about the response from viewers after exposure to the advertisement. None of these aspects directly determine the visual impact of an advertisement in the same way that color scheme and design do.