Ligament is

The correct option is modified yellow elastic fibrous tissue.

Step-by-Step Explanation:

1. Definition of a Ligament: A ligament is a tough, fibrous connective tissue that connects bone to bone in the human body, helping to stabilize joints and prevent excessive movement.
2. Composition of Ligaments: Ligaments are mainly composed of yellow elastic fibers, also known as elastin fibers, along with some collagen fibers. This high concentration of elastin fibers gives ligaments their characteristic elasticity and flexibility, allowing them to stretch and recoil as joints move.
3. Comparison with Tendons: Tendons connect muscle to bone and are composed of white fibrous tissue (mostly collagen), which is tough and inelastic to transmit forces efficiently. In contrast, ligaments require elasticity to accommodate joint mobility, which is why they are characterized as modified yellow elastic fibrous tissue.