If the interviewer asks such a question, it is likely that the position entails team management duties - current or future, which will most of the time already be outlined on the job posting. As such, he/she will assume you applied to this role upon having adequately read the job posting, and that you have an interest in team management and/or some sort of team management experience.

Tell the interviewer about your team management experience, should you have any, in a professional, volunteer, or educational capacity (alternatively). Try to provide an example related to the position/industry you applied for, as much as possible. If you cannot do so, provide any example by telling the interviewer you are positive your skills will easily be transferable.

Should you not have such experience, mention that you are more than willing to gain team management skills and would love to take on a leadership role. Mention how you would hypothetically handle such a situation.