What causes coral bleaching and why is it a global concern?

Coral bleaching happens when corals get too stressed and lose their colorful helpers, kind of like when you feel so tired that your favorite toy loses its shine.

Coral reefs are like underwater cities where many creatures live, and corals are the buildings. Each coral has tiny helpers called algae, which give them color and food, it's like having a little chef inside each building who cooks up energy for the whole city.

But when the water gets too hot or polluted, corals get upset. They kick out their little chefs, and without them, the corals turn white, that’s bleaching. It’s like if your favorite toy lost all its color and became boring.

If this happens a lot, the coral can’t recover, and the whole city suffers, fish leave, and other sea creatures lose their homes.

This is a global concern because coral reefs are spread out around the world, and many people depend on them for food and jobs. If corals keep getting stressed from warmer oceans and pollution, it could hurt not just the sea but also people who live near it, kind of like how your whole family feels when your favorite toy breaks.