Copper, they possess copper
Well a common method would be measuring in MPH, or miles per hour, giving you the answer of A. Hope this helps!
1) The lithospere is made up by the two outtermost layers of the Earth: the crust and the upper mantle.
2) the rocky layer is the Crust! it's the layer on which we walk, all the other layers are under this layer.
3) The core of Earth is made of iron and nickel.
