What is ​an agricultural laborer bound under the feudal system to work on their lord's estate.

​knight

serf

lord

vassel

serf

An agricultural laborer bound under the feudal system to work on their lord's estate is called a serf.

The correct answer is "serf". In order to find the answer, we can break down the question into smaller components.

First, we need to recognize that the question refers to a specific term related to the feudal system. To understand the context of this system, we can conduct a quick internet search or consult educational resources that explain the feudal system.

Once we have a basic understanding of the system, we can analyze each option provided in the question. A "knight" is a term associated with the feudal system, but it refers to a warrior or a noble in service to a lord, rather than an agricultural laborer. A "lord" is also a term related to the feudal system, but it refers to the owner of the estate, who typically has serfs working for them. Finally, a "vassal" is another term associated with the feudal system, but it refers to a subordinate or lesser noble who pledges loyalty and service to a higher-ranking lord.

By process of elimination, we can determine that the correct answer is "serf," which accurately describes an agricultural laborer bound under the feudal system to work on their lord's estate.