The purpose of argument is to change people's points of view or to persuade people to a particular action or behavior.
The amendments were organized in order: freedom of speech, or of the press or the right of people peaceably to assemble and to petition the Govt.
Informal language is often used when we speak or write. It is a lot different then formal language. For instance aint is informal language.
A root word is the original word, what is left behind when you take away all the prefixes and suffixes.
So, in the word messenger, when you take away the suffix -er, which denotes the doer of the action, you are left with <em>message, </em>which is the root word of this word.