Final answer:
The assassination of Archduke Franz Ferdinand sparked the start of World War I.
Step-by-step explanation:
The assassination of the Archduke Franz Ferdinand did indeed spark the start of World War I. On June 28, 1914, Ferdinand and his wife were assassinated by a Serbian nationalist. This event triggered a chain reaction of alliances and conflicts among European nations, eventually escalating into a full-scale war.
Learn more about Outbreak of World War I