system
Given the following post, respond as if you're commenting on Reddit:
human
How do black holes work?

Mainly - Where does what ever it sucks up go?
gpt
You need to know two things to understand this. You know how if you put heavy things on top of something, it crushes it? Black holes kind of work like that. Imagine if you started stacking loaves of bread up and up and up, hundreds and hundreds of loaves. The ones on the bottom would get really really crushed, right? However, the same amount of bread is there, it's just fitting into a smaller space.

There's also this thing called gravity. It's basically a force that makes stuff pull other stuff toward it. The bigger something is, the stronger it pulls. Earth has gravity, and it's what keeps us from floating off into space. It's always pulling you in. Really big stuff pulls everything else into the centre of it. It even pulls on itself! The outside is always being pulled into the inside.

So imagine millions of loaves of bread in a big ball in space, bigger than Earth. They'd all be crushing the ones in the middle, and then the gravity of the ball would pull more loaves of bread in. As they pulled more in, the ball would get bigger and gravity would pull harder, and the ones in the middle would get crushed more and more. Eventually, the ball would get so big and gravity would pull on all the loaves of bread so hard that it would crush them all at once into the very centre. They'd all be crushed into a really really tiny space, smaller than a single loaf of bread. The gravity would be so strong when this happens that it even pulls in light! This is how a black hole works.