What anatomical structure is described as an articulation?

A joint is described as an articulation because it is the specific site where two or more bones meet to allow for movement. This connection can vary in flexibility and range of motion depending on the type of joint, such as hinge, ball-and-socket, or pivot joints. The term "articulation" specifically refers to the formation of joints and how they function to facilitate movement in the skeletal system.

In contrast, bones are the rigid structures that form the skeleton, while cartilage serves as a cushioning material between bones at joints but does not itself provide the connection point. Tendons attach muscles to bones and play a crucial role in facilitating movement, but they do not form the connection between bones, which is characteristic of a joint. Therefore, the distinct nature of a joint as an articulation sets it apart as the correct answer in this context.