How was the rise of the new type of producer (leiber and stoller, phil spector, brian wilson) dependent on and a product of the brill building model?

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !

Idk for this one pal