An extended metaphor. None of the others seems correct.
<span> A few months later, Higgins's mother (Mrs. Higgins) is writing letters in her drawing room when she is interrupted by her son. She scolds him for turning up during her "at-home day," the day when she receives guests. Mrs. Higgins claims that her son scares off her guests.Higgins explains his bet with Pickering over Eliza and says that she is coming to the house to try out her accent. Mrs. and Miss Eynsford Hill are shown in, and they are the same mother and daughter who were waiting for a cab at the beginning of the play. Higgins recognizes them, but he cannot figure out where he has seen them before. Freddy also arrives. Miss Eynsford Hill tries to flirt with Mr. Higgins, but he rails at the company (including himself) for having no knowledge of science, philosophy, or poetry--merely knowing how to act in society.Eliza is shown in, exquisitely dressed, and she makes quite an impression. In fact, Freddy falls in love with her. Mr. Higgins realizes that they all met on that day at Covent Garden, but nobody else makes the connection. Eliza, who has been warned to limit her conversation to the weather and to people's health, talks about an aunt of hers who supposedly died of influenza but who was perhaps killed so that the killer might steal her new straw hat. Mr. Higgins grows alarmed, and Eliza leaves, but the Eynsford Hills think that by talking about coarse subjects and swearing, Eliza was using a new, fashionable type of slang. Pickering tries to support this assumption by declaring that he can no longer distinguish high society from a ship's forecastle now that people swear so often. Clara declares the "new slang" charming--and to her mother's horror, she herself uses the British curse word "bloody."
Mrs. Higgins invites the smitten Freddy back to spend more time with Eliza. The Eynsford Hills exit. Mrs. Higgins scolds the men, declaring that their project with Eliza, while clever, cannot work because no skill in pronunciation or fancy dresses can change the subject matter of what Eliza talks about. The content will trump the style; she will always give herself away. Like Mrs. Pearce, she also disapproves of the fact that Eliza lives in the house with the two men. Moreover, she complains that Pickering and Higgins are treating her like a "live doll."The men protest that they take Eliza very seriously and are quite taken with her talents, including the fact that she has a wonderful ear and has taught herself to play the piano. Mrs. Higgins reminds them of the problem they have not yet faced--what to do with Eliza after the experiment is over--and the men reply that they will set her up in some sort of genteel occupation. They exit, talking about how they will take Eliza to a Shakespeare exhibition and then have her mimic all of the people there when they get home. Mrs. Higgins resumes writing letters and exclaims, "men!!" with exasperation.AnalysisIn this act we witness the transformation of Liza the flower-girl into Eliza the society lady. The change caused by repackaging her in new clothing and providing her with a new accent is so complete that she goes unrecognized by people who have seen her in her former state. Even the rough content of her conversation does not reveal her class, despite the concerns of the people who know to look out for such content.</span>
The hottest place on earth is the inner core, which is in the centre, and is located beneath the crust, mantle, and outer core.
hope this helps
