Which of the following rocks may contain fossils of plants, animals and other microorganisms that once lived on them?

Correct option is C

Sedimentary rocks may contain fossils of plants, animals and other microorganisms that once lived on them.
Three types of rocks are:
· Igneous rock.
· Sedimentary rock.
· Metamorphic rock.
1. Igneous rocks are formed from melted rock deep inside the Earth. Igneous rocks (derived from the Latin word for fire) are formed when molten hot material cools and solidifies. Igneous rocks can also be made a couple of different ways. When they are formed inside of the earth, they are called intrusive, or plutonic, igneous rocks. If they are formed outside or on top of Earth’s crust, they are called extrusive, or volcanic, igneous rocks. 2. Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons. Sedimentary rocks are formed from the accumulation and lithification of sediments over time. There are three different types of sedimentary rocks: clastic, organic (biological), and chemical.
3. Metamorphic rocks formed from other rocks that are changed by heat and pressure underground. Metamorphic rocks have two classes: foliated and nonfoliated.