Which of these positions is typically responsible for advising on legal matters?

The Attorney General is the chief legal officer of the state or country and is responsible for overseeing the legal affairs and administration of justice. This position involves providing legal advice to government officials, representing the government in legal matters, and ensuring the enforcement of the law. The Attorney General also handles significant legal cases and issues that affect the legal system, which is why this position is particularly suited for advising on legal matters.

In contrast, the Secretary of Defense primarily focuses on military and defense policies, the Secretary of State deals with foreign affairs and diplomatic relations, and the Secretary of Transportation is responsible for transportation policy and infrastructure. Each of these roles has a distinct focus that does not involve the legal advisory responsibilities characteristic of the Attorney General's position.