Nicolas steno stated that younger rocks are deposited on top of older rocks. how is this related to the principle of faunal succession?   a. fossils in bottom layers of rock are likely older than fossils found in top layers of rock.   b. fossils in top layers of rock are older than fossils found in bottom layers of rock.   c. plant fossils will be found in bottom layers of rock, and animal fossils will be found in top layers of rock.   d. scientists do not expect to find fossils below four layers of rock.