Which statement describes the law of superposition? Sedimentary rocks were originally in horizontal layers.
In horizontal rock layers, each layer is younger than the one below it.
Rock layers must be in existence before something can happen to them.
Rocks that are not in horizontal layers were shifted by some geologic event.

the answer is b (horizontal rock layers, each layer is younger than the one below it)

Explanation:

in rock layers, the top layer of a rock will be the newest, or youngest. and the very first layer at the bottom will be the oldest layer since the layers build on top of each other, hope that helps :)

The answer is B, "horizontal rock layers, each layer is younger than the one below it".

Explanation: The yougest rocks are closest to the serface. Rocks also form in horizontal layers.

well the answer is 2!

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.