Which type of rock is often deposited in layers and contains sand, pebbles, and frequently fossils? A) Metamorphic B) Igneous C) Sedimentary D) Compacted

What the clue in the description is pointing to

The key clues are “deposited in layers” and “often contains fossils”. That combination strongly points to rocks made from deposited sediments at Earth’s surface.

Why sedimentary rock fits best

Sedimentary rocks form by the processes of deposition, compaction, and cementation:

• Sediments (sand, pebbles, silt, mud) settle out in water or wind and build up in layers.
• Over time, pressure compacts the layers.
• Minerals cement the grains together into rock.

Because this happens at or near the surface, dead organisms can be buried in the layers and preserved as fossils.

Why the other options do not match

• A) Metamorphic: formed when existing rock is changed by heat and pressure; fossils are usually destroyed or distorted.
• B) Igneous: formed from cooled magma or lava; fossils do not survive melting.
• D) Compacted: compaction is a process, not one of the three main rock types (igneous, sedimentary, metamorphic).