The correct answer is A. Sedimentary rock.
Sandstone is a sedimentary rock composed of sand-sized grains of mineral, rock, or organic material. The grains of sand are cemented together by a natural adhesive, such as silica, calcium carbonate, iron oxide, or organic matter. Sandstone is a common type of rock, and it is found in many different parts of the world.
Sedimentary rocks are formed when sediment, which is material that has been transported by water, wind, or ice, is deposited and compacted. The sediment can be made up of a variety of materials, including sand, mud, and pebbles. Over time, the sediment is buried deeper and deeper, and the pressure and heat from the weight of the overlying sediment causes the sediment to change into rock.
There are three main types of sedimentary rocks: clastic, chemical, and organic. Clastic sedimentary rocks are formed from the accumulation of pieces of other rocks. Chemical sedimentary rocks are formed when minerals precipitate out of water. Organic sedimentary rocks are formed from the remains of plants or animals.
Sandstone is a type of clastic sedimentary rock. It is formed when sand-sized grains of mineral, rock, or organic material are transported by water, wind, or ice and then deposited. The grains of sand are then compacted together by a natural adhesive, such as silica, calcium carbonate, iron oxide, or organic matter.
Sandstone is a common type of rock, and it is found in many different parts of the world. It is used in a variety of construction applications, including building walls, roads, and bridges. It is also used in the manufacture of glass, ceramics, and other products.
The other options are incorrect because:
- Metamorphic rocks are formed when existing rocks are subjected to heat and pressure.
- Igneous rocks are formed when magma or lava cools and solidifies.
- Volcanic rocks are formed when magma or lava erupts from a volcano.