Final answer:
Petruchio uses reverse psychology on Katherine by taking away her food and bed to tame her in Shakespeare's 'The Taming of the Shrew'.
Step-by-step explanation:
The question is about the character Petruchio in William Shakespeare's play 'The Taming of the Shrew.' Petruchio is using reverse psychology as part of his unorthodox method to tame Katherine, his headstrong wife. The answer to what Petruchio is doing to Katherine is: 1) Taking away her food and bed. He undermines her autonomy and tries to break her spirit by denying her basic needs, such as food and sleep, to make her more submissive.