We know from the past that popular music changes over time. What are the causes of those changes. describe why these things influence musicians creating of music.

there are many

Explanation:

The most prominent is probably politics, culture, and events. An example of this is the gothic culture where 2000 had more people liking rock due to many things, which are related to being emo. I forgot about Politics and I cannot think of a reason for events but this is my answer.