Explanation:
The ankle, knee, and elbow joints are examples of synovial joints are characterized by the presence of a synovial cavity, which is filled with synovial fluid. These joints allow for a wide range of movement and are the most common type of joint in the body. The ankle joint is a hinge joint, the knee joint is a hinge joint as well but also allows for some rotation, and the elbow joint is also a hinge joint that allows for flexion and extension movements.