A mechanism composed of two or more pieces constructed so that each part rotates in relation to the other around a common axis is a(n) ____________________.

Common Axis

Refers to the shared axis around which components or features are symmetrical or rotate, promoting alignment.

Rotates

The action of an object turning or spinning around an axis, either in a circular or semi-circular direction.

Mechanism

A system of moving parts designed to perform a specific function within a larger machine or device.