There is no correct answer here it depends on your body and how fast your motabolism is.
A. rust because rust is the only chemical weathering listed in the answers that i know of
Hope this helps!!!!!!!!
The ileum contains villi that project into the lumen and increase the amount of surface area.
Villi are small finger-like structures that project into the lumen of the small intestine. Villi increase the surface area of the intestinal walls for easy and quick absorption of digested food with the addition of digestive secretions. Villi vary in length from about 0.5 to 1 mm. They are usually found in large numbers at the beginning of the small intestine and they reduce toward the end of the tract.
T pairs with A ( answer a.).
Hope this helps !
Photon
