"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
Enzymes called proteases break down proteins within the stomach and small intestine. While in saliva, amylases break down carbohydrates and lipases break down fats.