How do the changes that Gregor's family undergoes contribute to the plot of The Metamorphosis?

The changes that Gregor's family undergoes significantly contribute to the plot of "The Metamorphosis" in several ways:

1. Initial Shock and Adaptation: At the beginning of the story, Gregor's transformation into a bug is a shock to his family. Their initial horror and disgust set the tone for the rest of the story and establish the central conflict. This contributes to the plot by creating tension and uncertainty.

2. Economic Struggles: Gregor was the primary breadwinner of the family. His transformation forces his mother, father, and sister to find work, altering the family dynamics and adding a layer of economic struggle to the plot. This change also contributes to the plot by highlighting the theme of dehumanization and alienation.

3. Change in Family Dynamics: As the story progresses, the family's attitude towards Gregor shifts from sympathy to resentment and neglect, especially as they become more independent and less reliant on him. This change in dynamics contributes to the plot by further isolating Gregor and emphasizing the theme of alienation.

4. Gregor's Death and Family's Relief: Gregor's death towards the end of the story brings a sense of relief to his family, which is a significant plot point. They are free from the burden of caring for him and can now move on with their lives. This contributes to the plot by providing resolution and emphasizing the story's themes of transformation and alienation.

In conclusion, the changes that Gregor's family undergoes are crucial to the development and progression of the plot in "The Metamorphosis". They not only drive the story forward but also highlight its central themes.