Why did the French Tribunal order execution of Maximilien Robespierre, one of the leaders of the revolution and new government?

The answer is stated below.

Explanation:

Maximilian Robespierre was an outstanding spokesperson for the French revolution. Gradually he became the most powerful man in France and had full control over the revolutionary government. But he himself started a rule of terror in which any voice against the revolutionary government was met with execution. Other revolutionaries fed up with this reign of terror made him arrested and executed.