Good thesis about a good friendship

In the franz kafka’s the metamorphosis after gregory turns into a giant insect he realizes his sister grete can’t stand to look at him. he hides from his sister and stays under a bedsheet.what does this act suggest about gregor?

Asap! can someone give the answers ?

In 250-300 words, explain how the theme of social justice is explored in the novel. {to kill a mockingbird}