Lady Bracknell has been described as "the perfect embodiment of the attitudes and rules of conduct of the British aristocracy." How does Wilde unmask the mercenary motives of Lady Bracknell to reveal her essential snobbishness and hypocrisy in the final act?

The character of Lady Bracknell was seen in a way that she represents British aristocracy. Wilde expresses her snobbishness and hypocrisy when Jack refuses Cecily and Algy to marry if Bracknell doesn't let him marry Gwendolen. Lady Bracknell refuses, showing her standing by and embracing the principles of British aristocracy.

answer: the first one climax ,the second   is plot

explanation:

it was surely an odd creature that one made up by reading the historians first and the poets afterwards a worm winged like an eagle; the spirit of life and elegance and charm,   in a kitchen chopping up suet. but these creatures, monst'r however entertaining to the imagination, hast no existence in fact. what one might doth to bringeth h'r to life wast to bethink poetically and prosaically at one and the same moment,   thus keeping in toucheth with fact—that the lady is mrs martin, ag'd thirty-six, did dress in blue, wearing a black coxcomb and brown shoeth; but not losing sight of fiction eith'r—that the lady is a vessel in which all s'rts of spirits and f'rces art coursing and flashing p'rpetually. the moment, howev'r, yond one tries this method with the elizabethan mistress, one brancheth of illumination fails; one is did hold up by the scarcity of facts.   one knoweth nothing detailed, nothing p'rfectly true and substantial about h'r.   hist'ry scarcely mentions h'r.   and i did turn to professeth'r trevelyan again to seeth what hist'ry meanteth to that gent.   i hath found by looking at his chapt'r headings yond t meanteth.