What internal process involving a black hole can actively quench star formation in a galaxy?

Answer

Powerful outflows driven by an active galactic nucleus (AGN)

A highly active supermassive black hole can blast remaining gas out of the galaxy's disk with incredible force or heat it, preventing it from collapsing into new stars.

What internal process involving a black hole can actively quench star formation in a galaxy?
Spacegalaxiesastronomydead galaxies