I believe the answer is: Elections
In democratic countries, elections determine which representatives obtained the support of the people and which are not. through election, citizens could identify the representatives that advocated for similar value and principles as us and appoint them as the extension of our involvement during the legislation process.
Answer:
For instance, Na+ is a positively charged ion that has an intracellular concentration of 14 mM, an extracellular concentration of 140 mM, and an equilibrium potential value of +65 mV.
If 18-year-olds could fight for our country they should be able to vote.