Fief can be defined as a heritable piece of land granted by the overlord to the vassal or the knights. The lord were the noble people who possessed or owned lands and vassals were the knights.
<u>The </u><u>knights</u><u> were granted a piece of land, known as </u><u>fiefs</u><u>, by these lords in exchange for their service and protection</u>.
This system of exchange of land for the service and protection is termed as feudalism.
So, the correct answer is the second option fiefs.
