The Statue were made from Volcanic Ash from the Rano Raraku Volcano
But nobody knows who made them...
Hope this helps!!
Submarine Canyon
Submarine Canyon's are steep-sided valley canyons cut into the seabed of the continental slope.
Explanation:
The western and central European section of the plain covers all of western and northern France, Belgium, The Netherlands, southern Scandinavia, northern Germany, and nearly all of Poland; from northern France and Belgium eastward it commonly is called the North European Plain.
B. It sits on the largest deposits of oil in the world.