I'm not sure what the options are for an answer but based on what I remember from my ENTO class, it would be secondary myiasis.
It helps in digestion of food
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
