Which treaty ended World War I and set the stage for future international conflicts?

The Treaty of Versailles is the correct answer because it formally ended World War I in 1919, and it had significant implications for future international relations and conflicts. This treaty placed heavy reparations and territorial losses on Germany, which contributed to economic turmoil and political instability in the country. The harsh conditions imposed by the treaty fostered resentment and nationalism, which were pivotal factors leading to World War II. Additionally, the Treaty of Versailles established the League of Nations, aimed at promoting peace but ultimately proving ineffective, highlighting the challenges in maintaining lasting international cooperation.

The other treaties listed do not pertain to the conclusion of World War I. The Treaty of Paris refers to various agreements throughout history, typically about other conflicts. The Treaty of Amsterdam pertains to the European Union and its amendments. The Comprehensive Peace Treaty is too vague, as it could refer to multiple agreements unrelated to World War I. Hence, the Treaty of Versailles stands out for its direct role in concluding the war and shaping future global tensions.