What was the spark that ignited World War I? Where did it take place?

The spark was the assassination of the Austro-Hungarian Arch Duke, Franz Ferdinand, by a serbian nationalist, in the city of Saravejo.

Explanation:

This assassination created a conflict betweent the powerful Austro-Hungarian Empire, and the weak and much smaller Serbia, something that prompted Russian intervention on behalf of Serbia.

Germany soon followed, and declared war on Russia because it was an ally of Austria-Hungary.

Finally, France and Britain declared war on Germany because they were allies of Russia.

daddy

explanation:

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.