Final answer:
As of early 2023, the correct answer to the student's question is not provided since political roles can change and the most current leader of the Opposition in Ontario should be verified for accuracy.
Step-by-step explanation:
The leader of the Opposition in Ontario, as of my last update in early 2023, is the head of the party holding the second-largest number of seats in the Legislative Assembly of Ontario who is not a member of the governing party. Please note that political roles can change, so it's important to check the most current information if accuracy is crucial.