Final answer:
Correct ans is D. A diarthrosis joint is a freely movable joint that allows for a wide range of motion. It can be classified into three categories based on the axes of motion it provides.
Step-by-step explanation:
A diarthrosis joint is classified as a freely movable joint. Diarthroses are the most common type of joint and include all synovial joints in the body. These joints allow for a wide range of motion and are divided into three categories based on the axes of motion they provide.
For example, a uniaxial diarthrosis joint allows movement in one plane, like the elbow joint. A biaxial diarthrosis joint, such as the metacarpophalangeal joint in the finger, allows movement in two planes. And a multiaxial diarthrosis joint, like the shoulder or hip joint, allows movements in all three planes.