How might citizens engage in civic life to influence politics and government.

They might start a riot or they just wont care

First they need to read widely about civic issues. They need to pay attention to the data on both sides of the questions.

They need to vote.

They can volunteer to help a political party or with specific issues or candidates. They can make phone calls and go door-to-door.

Above all, they need to encourage others to learn all they can and then to VOTE!

3. i would say one, but one is not prime nor composite.