Your elbow and knee are examples of a ligaments B joints, see cartilage, D angles

Your elbow and knee are examples of joints. Joints are connections between two or more bones that allow movement and provide mechanical support. Ligaments are the tough bands of fibrous connective tissue that connect bones to bones, stabilizing the joints and preventing excessive movement. Cartilage is a smooth and elastic connective tissue found in joints, acting as a cushion between bones and allowing for smooth movement. Angles, on the other hand, are measurements used to describe the spatial relationship between two lines or surfaces.