The given blank can be filled with mold.
Fossils refer to the leftovers of living things like animals, plants, and people. By studying fossils, the information regarding the extinct groups like ammonites, dinosaurs, and trilobites came into light. By examining the fossil records, one can tell about the existence of life on Earth, and how the different kinds of animals and plants are associated with each other.
One of the fossils formed when a plant, animal, or other organism dies and gets surrounded by sediment, is known as mold-fossil. In the process, the bones deteriorate, and decaying of flesh takes place due to chemical activities, and a formation of cavity takes place below the ground surface.
