you just need to pay attention to the details in the picture, you will definitely have your answer.
if you still don't realize where the answer is, pay attention to one more detail, which is in the middle of the frame, what do you realize
Yes, if necessary, your answer is right below

Explanation: That's because sitting like that is the only way to advise customers sitting in the car, because standing will not be able to see the customer's face to advise.