What is 'motion blur' in photography?

Motion blur in photography refers to the visual effect that occurs when moving subjects are captured during a photograph, leading to streaks or blurring of these fast-moving elements. This phenomenon is primarily achieved through the use of a slow shutter speed, which allows the camera to record the movement of the subject across the frame as it is being captured. The resulting effect can convey a sense of speed or dynamic action, making it a creative tool for photographers looking to portray motion in their images.

The other options relate to different aspects of photography. For instance, brightening of overexposed areas pertains to highlight recovery rather than motion. The creation of dramatic shadows involves aspects of light and composition rather than the capturing of movement. Lastly, sharpness in low light conditions relates to exposure settings and stabilization techniques rather than the concept of movement within the frame.