Answer :
Final answer:
The Balkan Peninsula was the area that brought all of Europe into a war.
Explanation:
The area that was just waiting to explode and bring all of Europe into a war was the Balkan Peninsula. During the early 20th century, tensions between different ethnic groups and imperial powers in the region were rising. The assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo, Bosnia, in 1914, which was part of the Balkan Peninsula, triggered the outbreak of World War I.
Learn more about Causes of World War I here:
https://brainly.com/question/30066547
