What measures the movement of the camera in an arc shape while maintaining focus on a subject?

The correct choice refers to a specific camera movement technique known as an arc shot. An arc shot involves moving the camera in a curved path around a subject while keeping the focus on that subject throughout the movement. This technique is effective for adding dynamism to a scene and can help convey the relationships between characters or elements within the frame.

In contrast to the arc shot, other movements like pedestal, track, and dolly have distinct definitions. A pedestal movement involves moving the camera up or down without altering its horizontal position. Tracking refers to moving the camera along a straight path, either in the direction of the subject or alongside it. A dolly shot is similar to tracking but specifically involves moving the entire camera closer to or further away from the subject along a straight path. Thus, the arc shot’s distinctive curved movement makes it the most accurate term for this camera technique.