Final answer:
The subject of this question is Arts, and it is about the seating categories in a concert hall. The different seating options in a concert hall, such as main floor, mezzanine, and balcony, are explained.
Step-by-step explanation:
The subject of this question is Arts. This question is asking about the seating categories in a concert hall. The information provided describes the different seating options in a concert hall, such as main floor, mezzanine, and balcony, and explains that mezzanine and balcony tickets tend to be cheaper than main floor tickets. This information helps to understand the various seating categories in a concert hall.