Question

Sol.(a) [Key Concept: Fossils — Preserved in Sedimentary Rocks] Fossils are generally found in sedimentary rocks, which are formed by gradual deposition of silt, sand, or calcium carbonate over millions of years in regions like lakes or seas. During their formation, dead animals were carried to the sea or large lakes, sank and got buried in the sediments. These preserved organisms are converted into fossils over geological time.