A) Uses the law of superposition to determine which rock is older or younger
Explanation:
When you say relative age of a rock, you are determining the age of a rock relative to another rock. In the case of superposition, you are determining the relative age of a layer of rock by comparing it to the position of another rock layer.
The law of superposition states that the younger rock layers will be found higher. So the deeper the layer is found, the older the rock layer will be compared to those on top of it.
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
