Why was World War 1 a world war?

World War 1 is a world war because Majority of Europe and its colonies fought in the war.

WWI was the first total war. The countries involved mobilized their entire populations and economic resources to achieve victory.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.