What kind of object do we think lies in the center of the milky way galaxy?

Astronomers believe that a black hole of about 4 million solar masses exists in the center of the milky way galaxy.

I hope this helps, if you have any questions, feel free to ask :)

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast.