Okay buddy, let me explain it to you in a way you can easily understand!
Sometimes, there are things in the air or water around us that are not good for us. We call these things "pollutants." They can come from factories, cars, and even things we use in our own homes.
When we breathe in these pollutants or get them on our skin, they can make us feel sick or act in ways that we wouldn't normally act. This is called "abnormal behavior."
For example, if there is a lot of pollution in the air, it can make us feel tired or dizzy. It can also make us cough or have trouble breathing. This is because the pollution is not good for our bodies.
If we are exposed to pollutants for a long time, it can also affect our brains and make us act differently. We might be more aggressive or have trouble concentrating. This is why it's important to keep our air and water clean so we can stay healthy and happy.
So, in short, pollutants are bad things in the air and water that can make us sick and act in strange ways, and we need to make sure we keep them away so we can be healthy and happy!