Why was pluto cast down to the underworld?

When the Romans conquered Greece, the gods Hades and Pluto were combined and replaced Dis Pater as the god of wealth, the dead and agriculture. The god Pluto lived in a palace in the underworld, far away from the other gods who lived at Mount Olympus.

Explanation:

Because he was a mouse's dog?

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.