Your question is Explain Postal Products and Services. 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).
You're speaking with a customer who wants to understand a postal provider's core offerings and when each one makes sense. You need to show that you understand the product set from the customer's point of view, not just list names.
What do you know about the products and services offered by US Postal Service?