Things are not always what they seem.
Yes it is an amazing poem and piece of writing work actually
<span> I believe that the excerpt which best reflect Gregor's isolated condition after his transformation is the first one:
He got into the habit of closely watching it for one or two hours before
it was opened and then, lying in the darkness of his room where he
could not be seen from the living room, he could watch the family in the
light of the dinner table and listen to their conversation—with
everyone's permission, in a way, and thus quite differently from before.
It shows how his family were all together, his parents and his sister, enjoying their time watching TV and talking, while he was in the other room all alone, with no one to talk to. He is lonely and completely isolated after his transformation, although he used to be the same thing even before he became a bug.
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The answer would be “many animals die prematurely in zoos because they are exposed to infectious diseases.” The claim is stating that something bad is happening in zoos and this one is the only bad side effect in the choices.