How were the Easter island statues built?

The Easter Island statues, also known as Moai, were carved by the Polynesian descendants of the island using tools made from basalt and other stones. The statues were carved out of the volcanic tuff found on the island and transported using a combination of rolling and rocking movements. It is believed that a system of ropes, ramps, and sledges was used to move the statues to their final locations around the island.