The answer is: E. Theocracy
Autocracy is a form of government in which one person holds all power. Bureaucracy is a system of government in which officials are appointed to carry out the decisions of the government. Democracy is a form of government in which the people hold power, either directly or through elected representatives. Diplomacy is the art of conducting negotiations between governments. Theocracy is a form of government in which religious leaders hold power.
Theocracy is different from the other options because it is the only form of government in which religious leaders hold power. In autocracy, bureaucracy, democracy, and diplomacy, the power is held by secular leaders.