This is music ! i will reward brainliest !

it's d, robert k merton. in 1994 he was awarded the national medal of science for his contributions to the field and for having founded the sociology of science.

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.

eurasia because it is europe and asia