"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.
I just finished my homework fast, I was bored to death. There wasn't 500 channels so there was a thing for a librarian to teach a kid like me about reading. I started reading early and I read all the time, because I love it.