Answer:
c. collagen
Explanation:
The chief protein that is present in most connective tissues, including scars, ligaments, and tendons is Collagen which is the most copious protein in the human body, It is the substance that carries the body together and builds a framework to produce power and structure. Some kinds of collagen fibrils, gram for gram, are even more powerful than steel. Collagen generation decreases with age and by smoking and through Ultra Violet light also.
