How are feudalism and kingdoms different?

Feudalism, also known as the feudal system, was a combination of the legal, economic, military, and cultural customs that flourished in Medieval Europe between the 9th and 15th centuries. Broadly defined, it was a way of structuring society around relationships that were derived from the holding of land in exchange for service or labor. Although it is derived from the Latin word feodum or feudum (fief),[1] which was used during the Medieval period, the term feudalism and the system which it describes were not conceived of as a formal political system by the people who lived during the Middle Ages.[2] The classic definition, by François-Louis Ganshof (1944),[3] describes a set of reciprocal legal and military obligations which existed among the warrior nobility and revolved around the three key concepts of lords, vassals and fiefs.[3]

monasticism. people often do monasticism in monasteries

silk

indigo  

rice

all the other answers are wrong