Final answer:
The correct ranking of the feudal pyramid from highest to lowest is nobles, knights, and serfs, with nobles at the top, knights serving them, and serfs working the land at the base. The correct option is A.
Step-by-step explanation:
The correct ranking of the feudal pyramid, from highest rank to lowest rank, is represented by nobles, knights, and serfs. Nobility, such as lords, were at the top of the hierarchy, followed by knights who offered military service and administered justice on behalf of their lords.
Finally, at the base of the pyramid were the serfs, who worked the land in exchange for protection and were often bound to it due to economic and social constraints. This system was characteristic of medieval society, especially after the collapse of the Roman Empire and during the Middle Ages in Europe.