Answer: Option A. "Sandstone"
Explanation:
Fossils are the remains of dead animals and plants formed under rocks from millions of years.
There are basically three types of rocks metamorphic, igneous and sedimentary.
Sandstone are the type of sedimentary rocks, in which most of the fossils are found. they are made up of rock grain formed in low temperatures and pressures which do not harm remaining fossil. fossils of mastodons and dinosaurs are the example found in sandstone.
Whereas granite and basalt (igneous rocks) and marble (metamorphic rocks) are formed under very high heat and pressure that can destroy fossil remains.
Hence, the correct option is A.
