The accurate statement based on the characteristics in the chart is:
The Thirty was an oligarchy, the ecclesia was a democracy, and the Mycenaean Palace was a monarchy.
The Thirty refers to a form of government characterized by tyrannical rulers and the use of exile and force, which aligns with oligarchy. The ecclesia allows all members to have a voice in political matters and makes decisions collectively, characteristic of a democracy. The Mycenaean Palace, with its palatial society led by a wanax (king) and strict control over districts, aligns with the definition of a monarchy.