A ligament is best defined as:

A ligament is best defined as tissue that connects your bones to other bones, which is accurately captured in the selected answer. Ligaments are dense, fibrous connective tissues that provide stability to joints by holding the bones together, preventing excessive movements that could lead to injury. This function is crucial in maintaining the structural integrity of joints and allowing for the appropriate range of motion.

In contrast, the other definitions do not accurately describe ligaments. Some choices mention aspects related to joint formation, muscle movement, or the connection between muscles and bones, which pertain more to other types of tissues, such as tendons or cartilage. For instance, tendons connect muscles to bones and are responsible for transmitting the force generated by muscle contractions, while cartilage serves as a cushion between bones within joints. Understanding these distinctions is essential in the study of anatomy and physiology related to movement and stability in the human body.