What is loss of innocence in Harry potter and the goblet of fire?

In "Harry Potter and the Goblet of Fire," loss of innocence is poignantly depicted through Harry's experiences during the Triwizard Tournament and the return of Voldemort. The tournament exposes Harry to the harsh realities of danger, betrayal, and the brutal consequences of adult conflicts, shattering his childhood naivety. The climactic moment when Voldemort resurrects and kills Cedric Diggory marks a significant turning point, highlighting the loss of innocence not only for Harry but for all young characters faced with the grim truths of their world. This transition underscores the overarching theme of growing up amidst the encroaching darkness of the wizarding world.