A central business district is a fancy term for a really busy area in a big city. It's the place where all the most important and bustling businesses are located, like banks, office buildings, shops, and restaurants.
Imagine that you are in a giant city with lots of tall buildings, busy streets, and people rushing around. Now, picture the place where all the banks and stock exchanges are. That's part of the central business district.
This area is usually the busiest part of the city, with lots of people going to work or doing business. You might see lots of cars and buses driving around, and people hurrying to catch trains and buses.
In this district, you'll also find some of the tallest and fanciest buildings in the city, like skyscrapers. So, if you ever go to a really big city, be sure to visit the central business district to see all the hustle and bustle!