Collagen is a type of ______.

protein

The correct answer is Option (3) -protein

Collagen is a type of protein. It is one of the most abundant proteins in the human body, making up a significant portion of connective tissues such as skin, tendons, ligaments, and bones. Collagen provides structural support, strength, and elasticity to tissues and organs. In addition to its structural role, collagen also plays a crucial role in wound healing, tissue repair, and skin elasticity. It is composed of amino acids, particularly glycine, proline, and hydroxyproline, arranged in a unique triple helix structure.