In the lab, archaeologists create inventories of all the material items they have retrieved from the excavations and surveys. These inventories account for every single item. Descriptions of pottery, shell beads, clothing fasteners, glass, projectile points, drills - to name a few - have to be described and classified according to the manner in which they were made, colors used (if any), morphology and function (what were they used for?). Because this description is basic to analyses of many kinds, archaeologists become specialists in these ____________________. Group of answer choices seriations variations systems of description typologies