What is the form used most in pop songs? A. Verse and chorus
B. Ternary form
C. Rondo form
D. Call and response

verse and chorus

Explanation:

most songs use this form in popular pop songs today.

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.