Your question is Clarifying Test Plan Ownership. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you had to clarify confusion between a test plan and a test strategy on a project, including who should own each document. How did you align the team, and what was the outcome?