Selective focus is a technique that guides the viewer's attention to the area of the image that is in sharp focus, highlighting it against a softer, blurred background. This can be used to draw attention to a particular subject, create a feeling of depth, or add an artistic quality to the photo. The human eye is naturally drawn to areas of contrast and clarity, making selective focus a powerful compositional tool to direct the viewer's gaze and emphasize the photo's intended focal point.