The argument that classical composers write in a variety of styles dispels the myth that .
classical music is old
classical music all sounds the same
classical music is hard to understand
none of the above

Classical music all sounds the same.

Explanation:

If they're written in a variety of styles, then they can't sound the same.

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.