Answer the following question given this paragraph: 

There are a variety of types of movable joints, which are illustrated in Figure below . The joints are classified by how they move. For example, a ball-and-socket joint , such as the shoulder, has the greatest range of motion, allowing movement in several directions. Other movable joints, including hinge joints such as the knee, allow less movement.


Q: Give an example of a ball-and-socket joint, which has the greatest range of motion, allowing movement in several directions.

 Choices:

- pulley

- lever

- monkey wrench

- shoulder

A:
shoulder
