To fill in the sentences, here are the possible terms you could use based on common knowledge of early civilizations:
- The highest social class of early civilizations was held by nobility (or aristocracy).
- The lowest social class consisted of slaves (or peasants).
- Groups such as merchants (or artisans) were considered to be part of the middle level of society.
- Rulers claimed that they were given the right to rule by divine right (or gods).
You can replace the terms based on the specific options provided in your exercise if they differ from the above suggestions.