Concept:Sedimentary rocks are formed when loose materials settle, get buried, compacted, and cemented under water.
Explanation:Weathering breaks down existing rocks into small particles.
These particles, also called sediments, are transported by water.
Eventually, they sink and accumulate in layers at the bottom of seas, lakes, or rivers.
As more sediments pile above, the pressure squeezes the lower layers together.
Dissolved minerals like silica or calcium carbonate act as cement.
They bind the grains into solid rock.
This is why sedimentary rocks often show layers.
Common examples include sandstone, shale, and conglomerate.
Metamorphic and igneous rocks form under heat or pressure from magma, not from underwater cementation.
Answer: C. sedimentary