Who were the main sources of secular music during this era ?

Michael Jackson and Beyonce

Explanation:

It just is

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.

why are there few examples of totem poles from before 1900

hope this !