Which of the following accurately defines a ball-and-socket joint?

A ball-and-socket joint is characterized by its ability to allow movement in multiple directions. This type of joint consists of a spherical head (the "ball") that fits into a rounded cavity (the "socket"), enabling a wide range of motion including flexion, extension, abduction, adduction, and rotation. Examples of ball-and-socket joints include the shoulder and hip joints, both of which facilitate significant freedom of movement necessary for various physical activities.

The feature of multi-directional movement is crucial as it distinguishes ball-and-socket joints from other types of joints, such as hinge joints, which permit movement in only one plane, or pivot joints, which allow for limited rotation around a single axis. The design of a ball-and-socket joint provides both mobility and a degree of stability, but it is primarily the versatility in motion that defines its function.