Your question is Handling Team Underperformance. 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).
What would you do if a teammate wasn't pulling his weight? Explain how you would determine whether the issue involved capability, clarity, motivation, or competing priorities. Describe how you would address it directly, protect shared commitments, and involve a manager only when appropriate. Use a specific past example if possible, including the outcome and what you learned.