There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water.
C. allows historians to confirm that a source’s information is correct. Hope that helps!
C. The Rocky Mountains I believe, Mt. Elbert is in Colorado and the Rocky Mountains go through Colorado.
The age of the Earth is around 4.6 billion years old