Briefly trace the geographical and ethnic variations of Balkan region. Why did this region become politically very explosive ?
OR
What is meant by Balkan ? Why did it turn into a perennial source of tension and proved the battlefield of the First World War ?
OR
How did the disintegration of the Ottoman Empire make Balkan region very explosive? Explain.
OR
Why did the Balkan region of Eastern Europe present the most serious source of nationalist tension in Europe ? Explain any five reasons.