What term refers to the rise of a style of rock from a small, regional underground scene up to mainstream pop culture and then the style's subsequent retreat?

This is referred to as a Popularity Arc.

It is a musical term that means the rise and fall of a style's popularity though a stage of commercial boom (mainstream popularity) and then once the popularity dies down the style then retreats back into it's underground state or sometimes disappears completely.  

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

i truly dont know the answer wait i do its 1,3,4