Plz help this is a question form on the 1900-1929 music time period ill mark brainlist What was going on that had historical significance?

How was the music of the time influenced by these historical activities?

What evidence is there of this?

What period/styles in music were occurring during this time?

Who were some of the popular artists/composers of the time?

For what purpose was the music written/performed?

What notable differences are there from the music of this time and that which we have listened to in the past? (How has the music changed?)