Final answer:
The 21st Amendment, which repealed Prohibition, was not proposed by a single member of Congress, but was rather a collective response to the issues arising from the 18th Amendment and public demand for change.
Step-by-step explanation:
The 21st Amendment was proposed as a solution to repeal Prohibition, which was the ban on the sale, manufacture, and transportation of alcoholic beverages in the United States established by the 18th Amendment. On February 20, 1933, the Congress passed the resolution proposing the 21st Amendment, which was then sent to the states for ratification. It was not the creation of a single member of Congress, but rather a collective response to the public’s outcry and the problems stemming from Prohibition. After a call for change due to events like the St. Valentine's Day Massacre and the recognized ineffectiveness of Prohibition, Congress acted to propose the 21st Amendment, which was ultimately ratified by state ratifying conventions, the only amendment to be ratified in this manner, demonstrating a unique and unprecedented level of direct state participation.