What treaty ended the Mexican-American War?

The Treaty of Guadalupe Hidalgo is the correct answer because it was the agreement that formally ended the Mexican-American War, which lasted from 1846 to 1848. This treaty was signed on February 2, 1848, and it resulted in significant territorial changes, with Mexico ceding a vast amount of land to the United States, including areas that would become California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming. The treaty not only marked the end of hostilities but also laid the groundwork for the expansion of the United States, fulfilling the idea of Manifest Destiny.

Other treaties mentioned in the options are related to different historical contexts. The Treaty of Versailles, for instance, is associated with the end of World War I and has no connection to the Mexican-American War. Similarly, the Treaty of Paris pertains to multiple historical events, including the end of the American Revolutionary War, but not the conflict between Mexico and the United States. The Adams-Onís Treaty is another separate agreement concerning the U.S. acquisition of Florida from Spain and does not tie to the events surrounding the Mexican-American War. Thus, the Treaty of Guadalupe Hidalgo is uniquely positioned in history as the formal end to that particular conflict.