Answer:
A. Monarch; Nobles: Knights; Peasants.
Explanation:
The Monarch is the supreme leader of large tracts of lands. They in turn grant tracts of lands to Nobles, who pledge loyalty to them.
Nobles, grant tracts of lands to Knights; who in turn, pledge loyalty to their Nobles. The Nobles then use these knights to help the Monarch in time of war.
Knights are granted tracts of land, and they are generally coupled with peasants. They are used to help cultivate and farm the land to produce food enough for everyone.
The peasants are part of the lowest, but largest base of the pyramid. They usually come attached with land, are granted no land, and work for being able to live on the land, food, and protection.
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