The term decrescendo tells the musician to perform what action? A. make sound louder gradually
B. make sound softer gradually
C. make sound louder quickly
D. make sound softer quickly

I think the answer is

"B"

B. make sound softer gradually

answer; his friendship with claude monet;

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.