Which is a characteristic of feudalism?

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Feudalism was characterized by a hierarchical social structure with nobles and lords at the top, followed by knights and peasants. This system was relatively stable and conservative, with little social mobility. The economy was based on agriculture and self-sufficiency, and there were few large cities or advanced systems of trade. Military force was a key aspect of feudalism, but it primarily served the interests of the ruling class rather than the masses.

Which Is a Characteristic of Feudalism