In The Metamorphosis, why has Gregor stopped eating, and what is the significance of the familys habit of putting in this room things for which...

Gregor has largely
stopped eating because he has become so depressed. His father has gone back to work, his sister
has mostly stopped caring for Gregor, and she has become incredibly irritable to boot. Gregor is
also still suffering from the wound inflicted and continually exacerbated by the apple which is
lodged in his back. This wound impacts Gregor's ability to move freely and reminds him that he
is essentially only "endure[d]" by his family at this point. He is also made to feel
terrible by the cleaning woman, as she calls him an "old dung beetle," and she taunts
him rather than actually cleaning his room.

The narrator also tells us that
"People had grown accustomed to put into storage in his room things which they couldnt put
anywhere else, and at this point there were many such things [...]" because the family is
renting rooms to boarders in order to bring in a little more money. If something cannot be put
to use to improve the boarders' experience and, thus, earn money for the family, then it is
deemed inessential and extraneous and added to the pile in Gregor's bedroom. It is notable that
Gregor's room becomes the repository for things that have nowhere else to go, for things that
serve no necessary purpose, as he has nowhere else to go and serves no necessary purpose, in
their eyes, either. Without the ability to work and support his family, he too becomes
superfluous and unimportant to them.