 corals are aquatic animals that live in warm oceans & an sky is a mean of mind of land & if fossils of an aquatic animal or plant are found in a place then that place used to be covered by water in the past -> if fossils of corals are found in a place then that place used to be covered by warm oceans in the past if fossils of corals are found in a place then that place used to be covered by warm oceans in the past