Which setting would allow for capturing motion blur in photography?

To capture motion blur in photography, using a slow shutter speed is essential. A slow shutter speed allows the camera's sensor to be exposed to light for a longer duration, which in turn can create a blurred effect of moving subjects within the frame. This technique is particularly useful for conveying a sense of motion or speed, such as the flowing movement of water or the fast pace of a running athlete.

When the shutter is open longer, any movement that occurs during that time is recorded as a blur, resulting in a dynamic and artistic representation of motion. Photographers often experiment with varying shutter speeds to find the right balance that effectively captures the essence of movement without resulting in unwanted blurriness from the camera shake.

In contrast, a fast shutter speed freezes motion, while high ISO primarily affects the sensor's sensitivity to light without specifically facilitating motion blur. A wide aperture impacts depth of field but does not directly relate to the capture of movement. Therefore, a slow shutter speed is the clear choice when the goal is to achieve motion blur in photography.