What major life transition does the protagonist in "The Metamorphosis" undergo?

The protagonist of "The Metamorphosis," Gregor Samsa, undergoes a profound and surreal transformation when he turns into a giant insect. This metamorphosis is the central event of the story and serves as a powerful metaphor for alienation and the burdens of societal expectations. It captures Gregor's struggle with his identity, the disconnection from his family, and his feelings of inadequacy, particularly regarding his role as the primary breadwinner of the household.

This transformation brings about significant changes not only in Gregor's physical state but also in his relationships and how he is perceived by those around him. The bizarre nature of the transformation raises questions about human identity, the nature of work, and familial obligations, reflecting broader themes of existential angst and the dehumanization in modern society.