Final answer:
Connective tissue that is flexible is made up of special proteins, such as cartilage, ligaments, and tendons.
Step-by-step explanation:
Connective tissue that is flexible is made up of special proteins. The options given in the question are:
- Ligaments: Ligaments are tough protein fibers that connect bones to each other. They allow for some flexibility between bones.
- Cartilage: Cartilage is a type of dense connective tissue made of tough protein fibers. It is strong and flexible, providing smooth surfaces at joints.
- Tendons: Tendons are tough, flexible bands of fibrous connective tissue that connect muscles to bones.
- Bones: Bones are not flexible; they provide the structure and support for the body.
Based on this information, the correct answer is B) cartilage.