Which feature enhances the aesthetic of moving graphics by creating a blurred effect?

Motion blur is the feature that enhances the aesthetic of moving graphics by creating a blurred effect. This effect simulates how the human eye perceives moving objects, lending a sense of realism and dynamism to animations. When objects move quickly, they naturally appear to have blur due to the limitations of our vision and the physical properties of light. In Adobe After Effects, enabling motion blur allows animations and fast-moving elements to retain a fluid quality, making transitions appear smoother and more natural.

The other options like speed blur, soft focus, and layer blur serve different visual purposes. Speed blur is often associated with altering the perception of motion speed rather than producing a realistic motion blur for graphics. Soft focus is generally used to create a dreamy, visual effect that blurs the details of an image rather than simulating movement. Layer blur applies a general blur across an entire layer, which is not specifically designed to enhance the impression of movement. Hence, motion blur remains the optimal feature for achieving the desired result in moving graphics.