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Today's knowledge of fossil ages comes primarily from radiometric dating, also known as radioactive dating. Radiometric dating relies on the properties of isotopes. These are chemical elements.','.
The United States entered<span> the war because of the Germans' decision to resume the policy of unrestricted submarine warfare, and the so-called "Zimmerman telegram," intercepted by the British, in which Germany floated the idea of an alliance with Mexico.
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Why Did The US Enter WW1 - eNotes.com<span>https://www.enotes.com/homework-help/why-did-united-states-enter-world-war-400883</span>
Answer: The Wagner Act, or the National Labor Relations Act, was a New Deal reform passed by President Franklin Roosevelt on July 5, 1935. It was instrumental in preventing employers from interfering with workers' unions and protests in the private sector.
Explanation: