Depending on the part of the story you mean,
It is most likely because his sister Greta was playing the piano. Before Gregor became a bug he used to love listening to her play, and as his mind changed into bug form, he forgot he must stay hidden and decided to go watch her play.
Answer:
You didn't attach the passage
Explanation:
Look up a list of themes and try to match which one fits.
A caption to describe what is featured in the picture. To explain something about the energy efficiency of the car
I have uploaded a picture of the word <em>distraught</em> in the dictionary. I believe the best answer would be "agitated"
Hope this helps! God bless :-)