What german moves and diplomatic failures led to the start of world war ii in europe? what role did the soviet union play in the road to war?

Germany began to build up its military when Adolf Hitler came to power.  After that he began invading one European country after another.  Russia had signed a non-aggression pact with Germany. France and Great Britain were still recovering from the previous war that they signed a treaty of appeasement with the Germans who later took territory from Czechoslovakia.  When Germany invaded Poland with Russia’s help, it started The Second World War. 

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.

the answer to your question is

the treaty of hopewell