So, you know how there are lots of different plants and animals in the world? Well, when we build things like houses, roads, and factories, sometimes we can accidentally hurt or even kill some of those plants and animals. That's not good, because all living things are important and we don't want to hurt them!
So, to make up for this harm, some people have come up with an idea called "biodiversity offsetting." It's kind of like saying "Oops, sorry we hurt these plants and animals. Let's try to make up for it by helping other plants and animals somewhere else."
Here's how it works: let's say someone wants to build a new road through a forest where lots of different kinds of animals live. Before they start building, they have to talk to some experts who know a lot about the animals in that forest. The experts check to see how many animals might get hurt when the road is built, and try to come up with a way to make up for it.
One possibility could be to make a new home for those animals in another nearby forest, where there aren't any roads or buildings yet. The experts might plant lots of new trees and make sure there's plenty of food and water for the animals there. That way, the animals who lost their home in the first forest can live happily in their new home in the second forest instead.
It's kind of like playing a giant game of "musical chairs," but instead of chairs, it's homes for animals! The idea is that by making sure there are still plenty of different plants and animals living in the world, we can help make sure our planet stays healthy and happy for everyone, including us humans!