The author uses many strategies to show that his transformation is not only physical.
Explanation:
There are many signs that portray how Gregor is losing his humanity, for instance how he is a complete mess while he eats and how he prefers rotten food instead of the fresh one. Other example of this losing of humanity is how he discovers that he prefers to be under the furniture and that he really enjoys crawling on the walls. Finally, he accepts his change and gets used to this new shape.
Sustainable development can be defined as an approach to the economic development of a country without compromising with the quality of the environment for future generations.
