Areas with mountains is the answer
The Statue were made from Volcanic Ash from the Rano Raraku Volcano
But nobody knows who made them...
Hope this helps!!
D. methane
Soil and minerals are found in dirt, which is land, and forests are appart of land, but methane is a <span>flammable gas.</span>
My guess would definitely be false, public transportation seems like a much more reliable mean.