To whom are you writing your letter? what prompted your choice of topic and audience

Personally, I would choose this topic:Speech related to violence: You might want to write about limitations on freedom of speech related to violence. Speech that incites violence is not covered by the First Amendment and can result in prosecution in the United States. However, speech that merely supports violence as a political option is not considered a crime.
Part A: As this topic is something that is more of a national issue than one within one single school, I would address the letter to a member of congress. Addressing it to anyone else would do little to actually address the issue. 
Part B: 
Stance: While freedom of speech allows one to express their opinions publicly, those who engage in speech promoting violence, or hate speech, negatively impact society as a whole as well as on an individual level. As such, speech promoting violence should not be considered under the First Amendment, and those individuals who choose to engage in it should be persecuted.