Answer:
1. The protection of religious freedom is laid out in the First Amendment, which states that Congress cannot establish a state religion nor prohibit free exercise of religion. ... The Free Exercise Clause gives all Americans the right to practice their religion freely, without interference or persecution by the government.
2. the clause in the First Amendment of the US Constitution that prohibits the establishment of religion by Congress.
3. The establishment clause separates church from state, but not religion from politics or public life. Individual citizens are free to bring their religious convictions into the public arena.
4. it evaluates whether a law or governmental activity violates the establishment clause of the First Amendment.