I think that this question was asked by a bot made by brainly.
Under the feudal system, lords provided vassals with fiefs (which were pieces of land) in exchange for military protection, loyalty and support. In order to do their duties and obtain the priviledge, vassals had to swear on oath loyalty to a particular lord at a feudal ceremony.
Charles V abdicated his throne at the age of 56 between 1555-1556 because after almost forty years of ruling an empire (which included the Holy Roman Empire and the Spanish Empire) a series of severe and complicated health issues made him decide to retire.
Apart from ruling one of the most powerful reins by that time, Charles decided to finally abdicate his throne after he had many militaristic, political and especially health problems in his life. For example, he suffered from chronic indigestion, epilepsy as well as gout that was caused by his Hapsburg jaw condition. This disease deformed his jaw completely.
