The principle of superposition which states that in undeformed rocks, the younger rocks will be on top of older rocks, is particularly important because ________.
◦ it provided an order for assembling the relative ages of various rock layers
◦ it proved that life evolved by putting fossils in a logical order
◦ it showed that the interior of the earth is not growing outward
◦ it supports the laws of gravity which indicate that rocks must be deposited on something that already exists