Final answer:
The First Amendment limits religion by prohibiting the government from establishing one religion over another and protecting individuals' rights to freely practice their religion without government interference.
Step-by-step explanation:
The First Amendment to the United States Constitution protects religious freedom by prohibiting Congress from establishing one religion over another. The establishment clause of the First Amendment ensures that the government cannot endorse or promote a specific religion, while the free exercise clause protects individuals' rights to freely practice their religion without government interference. These limitations on government power ensure that religion remains a personal choice and not subject to government control.