Okay kiddo, so the European Union is like a big clubhouse with lots of countries as members. They want to make sure they do things in the best way possible for everyone, so they have something called advisory bodies. These are groups of people who give advice and opinions on different topics to the leaders of the EU.
Think of it like when you want to decide what game to play with your friends, but you're not sure which one everyone will like. You might ask your friends for their opinions so that you can make the best decision for everyone.
So, the EU has different advisory bodies for different things like science, environment, education, and more. These groups of people are usually experts in those fields, so they know a lot about what they're talking about.
The leaders of the EU listen to what these advisors have to say and take their opinions into account when making decisions. This helps to make sure that everyone in the EU is happy and that decisions are made in the best way possible.
Does that make sense, kiddo?