Illustration is an uncovering process. Illustration is the art of telling stories. The visual images that an illustrator creates starts the process similar to the first word on a page. Each image is part of a larger tale that can flow like a day dream and which is not to far from the truth sometimes.
Illustration’s hardest task is making you believe that this story could actually happen. Lines, shading, colors, characters, and backgrounds are just a few of the tools used to produce in the viewers mind an illusion, illustrated from the artists mind. That is how the best illustrators became icons like Dr. Seuess or Norman Rockwell they told a distinct story from any that had been drawn before.
One technique artists use is to draw the eye towards a focal point in the art. In Which characters display the attention of the viewer with specific acutraments that describe the purpose of the event or person in the scene.