"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.
It is women who bear the race in bloody agony. Suffering is a kind of horror. Blood is a kind of horror. Women are born with horror in their very bloodstream. It is a biological thing.