Explanation: To understand why this answer is the right one, I will give you a little insight into the story. The term vassal was born with the birth of feudalism in the Middle Ages, at that time the whole country was the property of the dominant aristocrat. The aristocrat will reward his country to the vassals who expect them to protect the aristocrat in return. Whenever a vassal fights for the aristocrat, the aristocrat will provide him with a country and expect him to protect the aristocrat for the rest of his life. Many medieval societies were characterized by feudal organizations, including England, which was the most structured feudal society, France, Italy, Germany, the Holy Roman Empire and Portugal. Each of these territories has developed feudalism in a unique way, and the way we today view feudalism as a unique concept is largely due to criticism after its dissolution. Karl Marx theorized feudalism as a pre-capitalist society characterized by the power of the ruling class (the aristocracy) in its control of arable lands, leading to a class society based on the exploitation of peasants who exploit these lands, typically under dererfum and mainly through labor, production and rents. – In Rome, only men with money and property could choose. Young people were even allowed to participate in the Greek Senate. In the Roman government, no Greek was allowed to serve.
– In Greece, all men had the right to vote. – In the Roman Senate, the most powerful part of government, all senators were patricians. In the Greek government, retired soldiers won automatic seats in the Senate. According to a classical definition of Francois-Louis Ganshof (1944), feudalism describes a series of reciprocal legal and military obligations that existed under the warlike nobility and revolved around the three key concepts of masters, vassals and fiefdoms, although Ganshof himself found that his treatment was related only to the « narrow, technical, legal meaning of the word ». 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. Defined as a whole, it was a way of structuring society around relationships derived from land ownership in exchange for services or work. Although it is derived from the Latin word feodum or feudum (fief), used during the Middle Ages, the term feudalism and the system that describes it were not understood by people who lived in the Middle Ages as a formal political system.  The classical definition of Francois-Louis Ganshof (1944) describes a series of reciprocal legal and military obligations that existed under the nobility of the warrior and revolved around the three key words of masters, vassals and fiefdoms.  Like other types of serfs, the Villeinen were obliged to provide other services, possibly in addition to paying for money or products.