In case of support settings, a consultant must allow the Knowledge Sidebar Setting to recommend articles to agents based on data in the case. While working on the console, the Knowledge sidebar keeps agents linked to your knowledge base.
Agents may recommend articles for cases they view, or they can find more products. You can also select articles from and follow and search within the knowledge using the sidebar to attach an item on a case (or remove articles)
I don't know if i'm too late with the answer but its: a strict system of social classes where elites ruled over commoners, a permanent place to hold ceremonies and rituals, and defensive structures, such as palisades, for villages.