The statement means that in a democracy, citizens have the freedom to voice grievances and criticize the government, which itself proves the system is working.
Example 1: Citizens can file RTI applications (like Nannu) to hold officials accountable — this complaint mechanism is possible only in democracy.
Example 2: People openly criticize political parties for dynastic succession, money power, and lack of internal democracy — such dissatisfaction expressed freely is proof that democratic rights are functional.
Thus, the ability to complain is a democratic right, and its exercise confirms democracy's success.
Source: Chapter 4 (Challenges to political parties); Chapter 5 (Outcomes of Democracy)
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The examiner expects you to interpret the statement — that complaints = freedom to express = sign of democracy working — and back it with two relevant examples from the chapters. Nannu's RTI case (Ch. 5) and public criticism of political parties (Ch. 4) are ideal. Avoid writing more than 50–60 words; two crisp examples with a linking line is enough for 2 marks.