What is the correct order of the following layers, from youngest to oldest?

Which of the following systems in absorbing oxygen and releases carbon dioxide

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Which beat describes the brain stem