Why is the effect of art in public messages more than beauty?

Correct answer: Because art makes the message attractive and memorable

The governing concept is the communicative power of visual art. In a public poster, notice or awareness message, colour, image, lettering, layout and contrast guide the viewer’s attention and help organise information. An attractive and memorable presentation can make people notice the message, understand its main idea quickly and recall it later. For example, a clear symbol combined with a short slogan can communicate a safety or environmental instruction more effectively than a long block of plain text. Therefore, option C is correct. Option A is wrong because effective design clarifies rather than hides the message. Option B ignores the public purpose of communication, and option D is opposite to the role of readable visual design.