Final answer:
The establishment clause of the First Amendment prohibits the government from endorsing or establishing a state-sponsored religion. It is commonly interpreted as the separation of church and state.
Step-by-step explanation:
The establishment clause of the First Amendment of the U.S. Constitution, also known as the Establishment Clause, prohibits the government from endorsing or establishing a state-sponsored religion. It is commonly interpreted as the separation of church and state, which means that there should be no favoritism of one religious belief over another or of religion over non-religion.