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Between 2008 and 2016, polls showed the state of the economy became far less likely to be considered the most important problem facing the nation. This is an example of:
Phosphate
A chemical derivative of phosphoric acid, containing the phosphate ion, PO4^3-, which plays a significant role in biological molecules such as DNA and ATP.
Sulfur
A chemical element that is a nonmetal, yellow in color, with the atomic number 16, commonly found in minerals and used in various industrial processes.
Nitrogen
A chemical element with symbol N and atomic number 7, essential for all living organisms as it is a major component of amino acids and nucleic acids.
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