What theme emerges in the story. consider what gregor's changing into an insect might symbolize?

I believe that the excerpt is entitled The Metamorphosis and the summary is indicated below:

The transformation and the unexpected events summarizes the theme of the short story and also do not forget the theme about the family approval. In the story, Gregor works a lot in order to pay off the debts of his parents but he is very unsatisfied with his work. Gregor's turning into an insect represents how little control he has over his own life. The more time Gregor works, the more of a vermin he becomes

answer; (b) temporal///frontal;