Lines are wonderful elements in a photograph. They draw the viewer’s eye through the image from one spot to the next, sometimes all the way around and sometimes in one direction. In the image above the line in the wheat as well as the direction of the combine leads you to the other elements in the scene.
Lines can put emphasis on distance or illustrate a relationship between foreground and background elements. The truck in the image above acts as a leading line as well as gives some perspective to the combine hard at work in the background.
Curved lines or S curves suggest sensuality, elegance and a serene sense of balance. S curves don’t necessarily need to be S-shaped; any form of a winding line can be used.