The correct answer is "Joints, 3."
In the human body, there are three basic types of joints:
- Fibrous joints - where bones are joined by dense connective tissue.
- Cartilaginous joints - where bones are joined by cartilage.
- Synovial joints - where bones are separated by a fluid-filled joint cavity that allows for a greater range of motion.
So, "Joints, 3" is the most accurate option.