In which social system is one class required to protect another class that then gives a portion of its agricultural labour and crops in return?

Question

Quizplus · Accepted Answer

Feudalism is a social system where a class of nobles or lords provides protection to a lower class of serfs or peasants, who in return owe a portion of their agricultural labor and crops to their protectors. This system was prevalent in medieval Europe.

In Which Social System Is One Class Required to Protect