a. the plates are in constant motion. as they interact along their margins important geology process take place. b. the plates are not in constant motion as they interact along the margins important geological processes take place such as the formation of mountain belts earthquakes and volcanoes. c. the plates are not in constant motion as they interact along the margins geological events takes place such as the formation of mountain belts earthquakes and volcanoes. d. the plates are in constant motion as they interact along the margins some geological process sometimes take place.
