In Act 4 of George Bernard Shaw's play Pygmalion, the character of Eliza Doolittle undergoes a transformation as she becomes more confident and assertive in her newfound role as a member of high society. The act begins with Eliza's return from her trip to the embassy, where she has been taking lessons in etiquette and elocution in order to pass as a lady at an upcoming garden party.
Upon her return, Eliza is greeted by her former teacher, Professor Henry Higgins, and his mother, who are both surprised by the transformation in Eliza's appearance and demeanor. Eliza is now confident and poised, and she speaks with a refined accent that belies her humble origins.
Despite her success at the embassy, Eliza is still unhappy with the way that Higgins and his mother treat her, and she makes it clear that she will not be a servant to them any longer. She demands to be treated with respect and to be given a fair wage for her work.
The act also reveals the changes in the relationship between Eliza and Higgins. In the beginning of the play, Higgins sees Eliza as nothing more than a project, a way to prove his theories about language and social class. However, as Eliza becomes more confident and self-assured, Higgins begins to see her as an equal and even admits that he has grown fond of her.
Overall, Act 4 of Pygmalion is a crucial turning point in the play as it marks the completion of Eliza's transformation from a Cockney flower girl to a confident and capable member of high society. It also highlights the changes in the relationship between Eliza and Higgins, as their dynamic shifts from that of teacher and student to one of mutual respect and understanding.