What must be true about the rocks shown in the diagram? A.
Rock layers X and Y are older than rock formation Z.
B.
Rock layers X and Y are younger than rock formation Z.
C.
Rock formation Z formed at the same time as rock layers X and Y.
D.
Rock layer Y formed after rock formation Z but before rock layer X.

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.