Final answer:
A tendon is a tough band that connects a muscle to a bone, while a ligament is a fibrous band that connects one bone to another.
Step-by-step explanation:
A tendon is a tough band of connective tissue that connects a muscle to a bone. It joins a muscle to a bone and allows muscles to pull on bones, enabling movement.
A ligament, on the other hand, is a band of fibrous connective tissue that connects one bone to another. Ligaments provide stability to joints by anchoring the bones together.
Therefore, the correct answer is A. A tendon joins a muscle to a bone; a ligament joins a bone to a bone.