Acclimatization is when your brain and body get used to something new. It's like when you first start school, you might feel a little scared because it's new and different, but after a few weeks, you get used to it and it's not so scary anymore.
Your brain has special parts called neurons that help you get used to new things. They send messages to other parts of your brain and body so that you adapt to changes.
For example, if you move from a hot climate to a cold one, your neurons will start sending messages to your body to help you stay warm. They might tell your muscles to shiver or your blood vessels to constrict. It might feel uncomfortable at first, but after a while, your body will get used to the cold and keep you warm without you even noticing.
Acclimatization can happen slowly over time, or it can happen quickly if something changes suddenly. Either way, your neurons are working hard to help you cope with new situations and keep you safe and comfortable.