Concept:Fossils are the preserved remains of living organisms, and they are found mainly in rocks that form from deposited materials.
Explanation:Sedimentary rocks are formed by the gradual buildup and compression of sediments, such as sand, mud, and organic matter.
When organisms die, they can be buried in these sediment layers.
Over time, the soft parts decay, but hard parts like bones and shells become fossils.
Igneous, metamorphic, and volcanic rocks are created under high heat or pressure, which destroys any organic remains.
Therefore, fossils are preserved only in sedimentary rocks.
Answer:B. sedimentary