6. after congress agrees on a proposed amendment, it then must be

Explanation:After being officially proposed, either by Congress or a national convention of the states, a constitutional amendment must then be ratified by three-fourths of the states. Congress is authorized to choose whether a proposed amendment is sent to the state legislatures or to state ratifying conventions for ratification.

the first 10 amendments to the u.s. constitution are known as the bill of rights. those 10 amendments establish the most basic freedoms for americans including the rights to worship how they want, speak how they want, and assembly and peaceably protest their government how they want. the amendments have also been subject to much interpretation since their adoption, particularly the right to carry a gun under the second amendment.

"a bill of rights is what the people are entitled to against every government on earth, general or particular, and what no just government should refuse, or rest on inference," said thomas jefferson, the author of the declaration of independence and the third president of the united states.