Final answer:
Stalin's reign of terror, marked by extreme control over Soviet life and the elimination of perceived state enemies, exemplifies a. Totalitarianism.
Step-by-step explanation:
Stalin's reign of terror in Russia, where he targeted and eliminated those he saw as enemies to the communist regime, is an example of Totalitarianism. Totalitarian regimes seek to exert control over all aspects of life, including political, social, and personal spheres. The Soviet Union under Stalin was characterized by extreme repression, the wide use of propaganda, and a pervasive secret police force that carried out his policies through terror, intimidation, and violence. This oppressive control, driven by the need to consolidate power and achieve state objectives, typifies a totalitarian state.