Answer:
World War I started in Europe.
Step-by-step explanation:
The conflict began with the assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo, Bosnia, on June 28, 1914. This event triggered a chain reaction of alliances and tensions among European powers that eventually led to the outbreak of war. Austria-Hungary, blaming Serbia for the assassination, issued an ultimatum to Serbia, which was rejected. As a result, Austria-Hungary declared war on Serbia on July 28, 1914. The war quickly spread as other countries became involved due to their alliances and interests. Eventually, the conflict escalated into a global war involving multiple nations and continents.