1. A request is the definition of Petition.
A petition is a formal request, usually one signed by several people, urging to authority in regard to a particular case.
2. A medium of exchange for purchases is the definition of currency.
Currency is a system of money usually used in a distinct country.
3. To set right; correct a wrong that was committed is the definition of redress. Redress means to remedy or set right an unwelcome or unfair situation.
4. Harassed or annoyed is the definition of Persecuted. To Persecute means to subject someone to hostility, primarily due to their race or political or religious beliefs.