Answer :
In Act 1, Higgins astonishes bystanders with his exceptional skill in phonetics by identifying their origins from their speech, leading to disbelief and amazement.
In Act 1, Higgins amazes bystanders by showcasing his remarkable talent for phonetics, particularly his ability to deduce the origins of individuals based on their accents and manner of speech. This ability initially creates a sense of astonishment and disbelief among the bystanders. Similar scenes of astonishment are found in various literary excerpts, where characters perform astonishing feats or reveal surprising transformations, such as a man removing his disguise, maidens turning from swans to humans, or individuals performing superhuman acts.