Hey!
From my understanding, this question is meant to be more specific than just the four broad departments. While it's fine to anchor your answer in one of the main areas (e.g. Private Wealth, Dispute Resolution, Corporate & Commercial, Real Estate), Forsters is really looking for an insight into specific practice areas or teams within those umbrellas (e.g. Residential Property, Planning, Contentious Trusts & Estates, etc.)
In your answer, I would:
- Name two specific practice areas/teams, not just two main departments
- Show you understand what that team actually does at Forsters
- Explain why those areas appeal to you (e.g. skills, type of work, client base, exposure during a TC).
That said, you definitely don't need to be overly niche - choosing a well-defined sub-area within the main practice areas is absolutely acceptable, and can show that you've researched the firm properly rather than giving a generic answer.
Hope that helps, and best of luck with your application!