Leo has a toy jack-in-the-box. When he turns the crank, the song plays. When it gets to the end of the song, a scary monster pops up out of the box. This makes Leo flinch with fear. Now when he hears the end of the song approach, he starts to flinch before the monster pops up. What are the components of classical conditioning in this example? Name and explain how and why each of the four components applies to this specific example. (For instance, the scary monster is the ______ in this example because ______.)