What connects bones in a cartilaginous joint?

In a cartilaginous joint, the primary connective tissue that links the bones is cartilage. Cartilage provides flexibility and support, allowing for slight movement between the bones while maintaining stability. This type of joint is found in areas such as the spine, where intervertebral discs composed of cartilage absorb shock and permit limited motion.

Ligaments primarily connect bones to other bones at synovial joints, while muscles facilitate movement by contracting, and tendons connect muscles to bones. In the context of cartilaginous joints, it is the cartilage that plays the crucial role of connecting the bones directly, thus making it the correct answer.