Answer:
That the family must find a way to get rid of Gregor.
Step-by-step explanation:
This is the realization that Grete comes to in part three of The Metamorphosis. In this story, Gregor has always been the strong person who takes care of the family. However, in his present condition. Gregor is no longer able to do so, and the family has to get used to not having him to help. However, this forces them to become autonomous and to start believing that Gregor is an unnecessary nuisance, and that the family must find a way to get rid of him.