Circumscription in logic is like a special way of telling a story where you focus on only the important parts and ignore the things that are not important. Imagine you are telling a story about a party you went to, but you only want to talk about the cake. You would say "I went to a party and there was cake. The cake was really good and everyone loved it." You don't talk about other things that happened at the party because they are not important to the story you want to tell.
In logic, circumscription is a way of focusing on the important parts of a situation and ignoring the unimportant parts. This helps make things simpler and easier to understand. For example, if you wanted to talk about a car, you might say "A car has four wheels, an engine, and a steering wheel." You don't need to talk about the color of the car or the brand name because that isn't important to the information you are trying to convey.
In summary, circumscription is like telling a story or giving information by focusing only on the important parts and ignoring everything else.