A galaxy’s central black hole is a life by choice.

– Before it was a black hole, it was a supernova, the end to a star’s life cycle. – Before it was a star, it was a cloud of gas.
– The black hole selectively feeds on frequent small meals rather than rare and dramatic galactic mergers. The black hole’s feeding choice is a decision.
– Its massive gravity causes ripples throughout the galaxy, creating stellar bodies and balancing the amounts of matter.

It must be a pretty darn good decision-maker.