How did Franz Ferdinand's death contribute to World War 1?

Well Ranz Ferdinand was assassinated, and this led the Austrian-Hungary government to be just a tad angry, so they tried to find out who did it. they thought it was this group of men withing their own country, but then they found out it wasnt them, it was a group of men from Sergia. So then Austria-Hungary declared war on Sergia, and then Germany got involved somehow, and then Britain declared war on germany, which was helping a-h. then all the allies got involved, and then it got split into 2 sides. pretty much what Franz's death did was llight the bomb that had been ticking away for a while. it was the spark that started it all.... it was bascially all about power...everyone wanted it.

there you go