The upper class is a group of people who have a lot of money and who often have fancy houses, cars, and clothes. They might live in big mansions or go on expensive vacations. You can tell if someone is in the upper class by looking at how they dress, where they live, and what kind of things they have. If someone has a lot of luxuries and seems very wealthy, they might be in the upper class. But remember, it's not polite to judge people based on how much money they have!
