The key signature allows the composer to use less accidentals which makes the music less cluttered. Just like the other person who answered this said when a score with multiple instruments is written it is almost always all in the same key to keep the music organized (their answer is better)
This image shows a top spinning. I believe the photographer really showed that it was moving fast, you can tell because of how blurry it is. I do think it could be taken in a brighter area. Hope this helps! Please give brainliest!
