Final answer:
Feudalism after the fall of western Rome resulted in the decentralization of political authority.
Step-by-step explanation:
The impact of feudalism after the fall of western Rome was characterized by the decentralization of political authority. Feudalism was a system in which power was decentralized, with local lords or vassals governing their territories in exchange for military service and loyalty to a higher lord. With the fall of Rome, central political authority weakened, resulting in the fragmentation of power and the rise of feudal lords who governed their own territories.