Final answer:
Franz Ferdinand was killed due to nationalist tensions in the Balkans, specifically involving Serbia and Austria-Hungary, leading to World War I.
Explanation:
Franz Ferdinand was killed because of the nationalist tensions in the Balkans at the time, particularly involving Serbia and Austria-Hungary. Serbian nationalist Gavrilo Princip assassinated Franz Ferdinand, heir to the Austro-Hungarian throne, in Sarajevo in 1914, triggering a series of events leading to World War I. Austria blamed Serbia for the assassination, leading to a chain reaction of alliances declaring war, including Russia supporting Serbia and Germany backing Austria-Hungary.
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