What type of motion involves movement around an axis?

Rotational motion is defined as the movement of an object around an axis. This type of motion is characterized by the rotation of the body, where points on the object move in circular paths around the axis. For instance, when a spinning wheel turns, every point on the wheel is moving in a circular path around the center point of the wheel, which is the axis of rotation.

In contrast, linear motion refers to movement in a straight line along a path, where all points on the object move in the same direction at the same speed. Translational motion is often used interchangeably with linear motion, signifying a change of position without rotation. Circular motion, while involving movement in a circular path, does not specifically imply rotation about an axis, as it can refer to linear paths that curve rather than rotate about an internal axis. Thus, the most accurate choice that describes motion involving rotation about an axis is indeed rotational motion.