The type of rock that contains bits of soil and the remains of once-living things is called sedimentary rock.

Here's why:

* Sedimentary rocks form from the accumulation and cementation of sediments. These sediments can include:

* Soil particles (sand, silt, clay)

* Organic matter (plant and animal remains, shells)

* Mineral fragments from other rocks

* Fossil formation: The remains of living organisms, especially those with hard parts (bones, shells), can become trapped within sediments and eventually fossilize within sedimentary rocks.

Examples of sedimentary rocks include:

* Sandstone: Formed from sand grains.

* Limestone: Often contains fossils of marine organisms.

* Shale: Made from clay and silt, often containing fossil fragments.

* Coal: Formed from the remains of ancient plants.