Find out what is being done to address the problem. For example, if the problem is too many stray dogs, you would write your letter to the part of your city government that runs the local animal shelter.

What part of your local government is in charge of what you are completing your service project on?
Remember this should be your local government for your community NOT state or federal government. How could you contact them?
Example sentence frames:
The part of my local government that is in charge of
is
I can contact them at

The part of my local government that is in charge of addressing food insecurity in our community is the Department of Social Services.

I can contact them at their office located at City Hall, or by calling their main phone line at (555) 123-4567.