Final answer:
The question is about an ethical dilemma related to a friend cheating on a test, which falls under Social Studies as it pertains to ethics. It is important to consider the consequences and to encourage honesty and integrity.
Step-by-step explanation:
The question presented seems to deal with an ethical dilemma rather than an academic subject. However, considering the context, it aligns closest with Social Studies, as it pertains to ethics and values, which are often discussed in social studies courses. If you know your friend is cheating on a test, it's important to consider the implications of your response. Cheating undermines the integrity of the educational system and can have significant consequences for your friend if he's caught, especially since it's his last warning. On the other hand, if you don't report him, you are complicit in his dishonesty. It would be wise to encourage your friend to stop cheating and to emphasize the importance of honesty and integrity in academic pursuits. Ultimately, the decision to report the cheating could be based on school policy and your own personal ethics.