This is where things get really cool! During metamorphosis, the maggot's body starts to dissolve and release special cells that will eventually form the adult fly's body. It's like a total reboot, where the maggot's entire system is upgraded to become a completely new creature!
But don't worry, it's not all gross and slimy (although, let's be real, it kind of is). The result of this transformation is a beautiful new fly, with shiny wings and a sharp mind (well, as sharp as a fly's mind can be, anyway)!