Respuesta :
The event that officially formed the alliance between Italy and Germany in World War II was that, Mussolini and Hitler signed the Pact of Steel to defend each other in a time of war. The correct option among all the options that are given in the question is the first option. I hope the answer has helped you.
Answer: A is correct Mussolini and Hitler signed the Pact of Steel to defend each other in a time of war.