"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.
Hunger is a political issue, and there are several things politically that are keeping people hungry - not funding food stamps adequately, not funding school lunches adequately. So there is a political solution to the problem of hunger.