It is important to know something about folk/ethnic music because

answer: the feeling it gives you when you look at it.

explanation:

in every single medium of art, you are supposed to feel something that makes it art. like how a song can make you cry, or how a photograph can make you nostalgic. art is very important for expressing yourself as well, when you are happy, sad, depressed, or angry.

answer; i believe the correct answer is ( it gives the photographer greater control over the print)