What ways were knights central to feudalism?

Knights were central to feudalism as they served as the primary military force for lords and kings, providing protection and enforcing the lord's authority over their lands. In exchange for land or fiefs granted by their lords, knights pledged their loyalty and offered military service, thereby reinforcing the hierarchical structure of feudal society. Additionally, knights upheld the code of chivalry, which emphasized values such as loyalty, bravery, and service, further solidifying their role as both warriors and noblemen within the feudal system.