Your question is Stack vs Queue. 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 a Stack and a Queue?
Keep your answer focused on ordering, how each structure adds and removes elements, and a simple real-world example for each. Do not drift into implementation details unless they help explain the behavior.