Upgrading of specific neighborhoods to encourage the middle and upper classes to relocate to them.

Urban Sprawl

Subcultural Theory

Urbanification

Compositional Theory

Sector Model

Gentrification

That's gonna be gentrification according to Education 2020; )

The answer is gentrification.

According to Beauregard (2016) gentrification is the movement of middle income households into low income neighborhoods; in order for this movement to take place such neighborhoods must be upgraded.

Historically, this phenomenon began as a way to save older central cities that were experiencing a decline, but nowadays, its socio-economic consequences are still being discussed.