Political liberty refers to the freedom of individuals to participate in political activities without any hindrance or repression. Option 1 is incorrect because while people`s control over the government may be a part of political liberty, it is not the sole defining factor. Option 2, which is the correct answer, acknowledges that political liberty involves the freedom for individuals to engage in various political activities. This can include expressing one`s political opinions, participating in elections, joining political parties or organizations, and engaging in peaceful protests or demonstrations. Option 3 is unrelated to the concept of political liberty as it refers to the relationship between politics and democracy. Option 4 is also incorrect as it focuses on voters` power to change governments, which is a different concept from political liberty.