Answer:
The assassination of Archduke Franz Ferdinand of Austria-Hungary and his wife, Sophie, Duchess of Hohenberg.
Explanation:
The event in Sarajevo that sparked World War I was the assassination of Archduke Franz Ferdinand of Austria-Hungary and his wife, Sophie, Duchess of Hohenberg. They were assassinated on June 28, 1914, by Gavrilo Princip, a Bosnian Serb nationalist. The assassination took place during a visit to Sarajevo, the capital of Bosnia and Herzegovina, which was then part of the Austro-Hungarian Empire. This event triggered a chain of diplomatic and military responses among the European powers, leading to the outbreak of World War I. Austria-Hungary's subsequent ultimatum to Serbia, and Serbia's rejection of some of its terms, ignited a series of alliances and conflicts that eventually escalated into a global war.
