the answer is none of the above.
Answer:
Any iron or metal cleaning
Expected life events wont be as terrifying because you know they are coming unexpected life events could be deadly though cause i mean cancer is usually unexpected and it could go on for a while without you knowing. Hope this helps!
Collagen
is a protein fiber that is found in the matrix that lies outside the bone
cells. Population of these collagen fibers that scattered through the matrix are
embedded in a gel-like ground substance called hyaline cartilage, which
is flexible but avascular and contains no nerves or blood vessels.
