Your question is Pairwise Correlation Range. 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 is the range for pairwise correlations?
Give the valid bounds for a correlation between two variables, and then state the key constraint that applies when multiple pairwise correlations are considered together in a correlation matrix. Keep the answer focused on the mathematical limits and feasibility conditions.