Final answer:
The assassination of Franz Ferdinand started World War I.
Explanation:
The event credited with starting World War I was the assassination of Franz Ferdinand. On June 28, 1914, Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria, which led to the beginning of the conflict. This assassination triggered a series of events that eventually escalated into World War I.
Learn more about World War I here:
https://brainly.com/question/41436193
