Since there is no passage I’m going to make an educated guess d since that one makes more sense sorry if wrong
Answer: index fossils
Explanation: i looked up each of the names you listed then them to see what would match and index fosil means "a fosil that is usefull for dating and correctlating the strata in which it is found
Answer: The North Atlantic Treaty Organization was created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union. NATO was the first peacetime military alliance the United States entered into outside of the Western Hemisphere.
An H-R diagram or known as "The Hertzsprung Diagram" is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature, and evolutionary stage.
Answer: regulating public service corporations
Explanation: due to it being public
