Why did Shaw make a professor of phonetics the hero of his play?

Shaw explains that he has chosen to make the hero of Pygmalion a phonetician in order to bring to light the need for reform of the English language.

D. he wanted the audience to see the value in speaking the language correctly

Explanation:) Shaw wanted the English to see the value in phonetics and improve the English language.

i think the literacy device is "it's frozen head"

from the political point of view it could be said that the candidate   is an effective speaker because she takes a strong position on the issue. it is an open discussion but probably she is making a presentation and can choose which subjects she wants to address. she is very likely to attain her aim which is to convince voters to accept her proposal.