What question is asked by the woman to get to know the man's profession?

The choice that directly helps the woman understand the man's profession is "What do you do?" This question specifically inquires about the man's job or occupation, which is the most straightforward way to learn about someone's profession.

When someone asks "What do you do?", it prompts the respondent to share their role, responsibilities, or field of work. This phrase is commonly used in conversations to gain insight into a person's professional life, making it very effective for the purpose of understanding someone's career path or professional identity.

The other choices, while they may touch on aspects of work, do not directly ask for the specifics of a profession. For example, "Who do you work for?" focuses on the employer rather than the job itself, while "Where do you work?" asks for location rather than the nature of the work. "Why do you work?" delves into motivations rather than the job description. Each of these questions could provide supporting information but ultimately does not directly convey what someone does for a living.