The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
A person who monitors governmental actions looking for waste or illegal practices is known as a compliance officer, monitor o auditor.
When working for the government, officials know that their job will be closely monitored and their actions, publicly scrutiny in order to always have proper, decent, and ethical behavior while in office.
A compliance official, monitor, or auditor, is the position that will check that there is always and ethical behavior and that procedures are correctly followed.