Why is r. mutt's (duchamp's) fountain considered so important in art history? do you believe it is art? why or why not?

answer; (binary). i believe this is the correct answer;

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.