The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The Bill of Rights is the first ten amendments to the United States Constitution. These include the natural rights of the US citizens such as the Freedom of Speech, Freedom of the Press, or Freedom of Religion, among others.
The Bill of Rights was an important part of getting the Constitution passed because the founding fathers made sure with this Bill of Rights that the new government would be the right kind of government for the people, avoiding any tyranny of a dictator, as was the case of the King of England.