Well, kiddo, world disclosure is when people find out more information about things that were previously kept secret or hidden. Imagine if you were playing hide and seek and your friend was hiding behind a curtain. You wouldn't know they were there until they moved the curtain and revealed themselves. That's kind of like world disclosure!
On a bigger scale, world disclosure means that important information about the world we live in is being shared with everyone. For example, scientists might discover something new about space or the ocean, and they will let everyone know about it so we can all learn.
Sometimes, world disclosure can be scary because it may reveal things that people were trying to keep secret. But it can also be exciting because it means we are constantly learning and discovering new things about the world around us.