Your question is Causation vs Correlation. 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 difference between causation and correlation?
Explain the distinction clearly and describe why observing that two variables move together does not establish that one causes the other. Address at least one confounding-variable example, reverse causality, and how a randomized experiment or an appropriate causal-inference design can provide stronger evidence. State the assumptions required before interpreting an observed association as causal.