Artworks are grouped together by there styles or . true or false

Which term is associated with the loudness of a sound

I’m a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.

Above is a picture of one of the most famous discoveries ever to be found in china. answer the following questions: - what does the picture show? - when and where was it discover? - who discovered it and what was he doing when he/she discovered it?