Biosecurity in Australia is a way to protect our country from things that can harm our plants, animals, and people. Think of it like a big shield that keeps bad things out.
These bad things can come in many forms - some are tiny germs and bacteria that can make us sick, while others are bigger, like insects or plants that can eat our crops and harm our native animals.
To keep these bad things out, Australia has strict rules and processes in place. For example, when you travel to Australia from another country, you have to declare any food, plants, or animal products you have with you. This is because some of these things can carry harmful pests and diseases that we don't want here.
Similarly, Australian authorities check all goods that come into the country for things like seeds, insects, or other living things that could cause damage. They also quarantine animals that come here from overseas to make sure they don't bring any harmful diseases with them.
Overall, biosecurity is an important way to protect our beautiful country and all the things that live in it. By being careful about what comes into our borders, we can keep everyone safe and healthy!