Correct answer: C. By voting
Explanation: Direct answer: C, By voting. Voting is the main peaceful and formal way in which citizens express which candidate, party or policy they prefer. Start from the basic idea: democracy gives people a voice; an election collects individual choices; votes are counted; the result helps select representatives or form a government. A, paying tax, is an important civic duty, but paying tax does not directly show which leader a person wants. B, remaining silent, gives no clear public choice and cannot select representatives. C, voting, is correct because each eligible citizen records a political preference. D, fearing, is wrong because a decision made under fear is not free democratic expression. In a democracy, people may also use discussion, petitions and public meetings, but among these options voting is the central answer. Memory cue: public will becomes visible at the ballot box.