Why was the Balkan Powder Keg such a danger to set off the Alliances?

Look it up somewhere else don’t be lazy kid

Because of the tensions in the Balkans and the consent fighting from both sides. The spark that ignited the powder-keg was the assassination in Sarajevo of the Archduke Ferdinand and his wife Sophia by Gavrilo Princip. He was a member of Narodna Odbrana, a Serbian nationalist organization.