Answer:
Most organizations have three management levels: first-level, middle-level, and top-level managers. These managers are classified according to a hierarchy of authority and perform different tasks. In many organizations, the number of managers in each level gives the organization a pyramid structure.
Yes, it's a dependent clause.
Answer:
In France, the three estates included the Church, the nobles, and the peasants. I believe that the same thing happened in England - nobles and peasants were a part of these estates in medieval England, and later on merchants, or tradesmen were added. But I would say that scholars didn't belong to any of the three estates in medieval English society, however, I am not completely sure.
