The words that complete the fragment correctly are: United Nations and Independent.
The excerpt talks about the transition towards independence of several nations that during the 20th century were still colonies of other nations.
During this period of time, the United Nations was establishing laws and agreements to help these nations achieve their independence. Therefore, the words that complete the fragment are United Nations and Independence.
Learn more about independence in: https://brainly.com/question/4273396
#SPJ1