What is an S-curve used for in a composition?

The use of an S-curve in composition is particularly effective for guiding the viewer's eye into or out of a scene. This technique involves a flowing line that resembles the shape of an 'S', which can be formed by elements within the image, such as pathways, rivers, or bends in landscapes. By incorporating an S-curve, photographers can create a sense of depth and movement, inviting the viewer to follow the curve through the visual narrative of the photograph. This leads to a more engaging and dynamic composition, enhancing the overall aesthetic and storytelling qualities of the image.

The other options, while they may have their own merits in composition, do not capture the specific purpose and impact of an S-curve. For example, creating straight lines pertains to different compositional techniques, and splitting an image into equal sections or eliminating negative space serves different compositional goals that do not utilize the unique advantages of an S-curve.