What do shading, characters, lines, colors and images in the five elements of printing mean respectively?

Shading: Texture, pattern or background pattern on printed matter. Characters: Characters, letters, numbers and other symbols on printed matter. Line: Line elements on printed matter, such as straight lines, curves and dashed lines. Color: color, hue, brightness, saturation and other color elements on printed matter. Images: Photos, illustrations, charts and other image elements on printed matter.