Portugal declined as a world power because it was conquered by Spain in 1580.
World power means a country, group, or institution with sufficient strength to affect or alter the course of global events.
The world's most powerful nation is still the United States, but other nations have seen their status decline due to increased volatility. They are published by US News and World Report and examine a country's political, economic, and military might as well as its influence.
Learn more about world power here:
https://brainly.com/question/13889909
#SPJ4
