Question

why is freedom of speech limited in the united states?
to protect people and the country
to give the government authority
to punish people who act violently
to keep people from wearing certain clothing

Explanation:

Freedom of speech limitations in the US are mainly to safeguard people and the nation from harm like incitement to violence, hate - speech, etc. These limitations are not about giving government authority for its own sake, punishing violent acts (which is a different legal matter), or regulating clothing.

Answer:

to protect people and the country