Answer:
The most important of those ten amendments is the First Amendment.
Step-by-step explanation:
The First Amendment establishes freedom of religion, freedom of speech, freedom of the press, and freedom of assembly, and forbids the government form making any law infringing these rights.
This Amendment is very important because if forms the basis of civil liberties in the United States. In the U.S., thanks to the first amendment, people can express their opinions freely, can follow any faith they want, can form associations with like minded people, no matter the origin or the creed, and can inform the people about public affairs thanks to guaranteed free press.