>>15842020By consuming energy in the form of food and smiting it by interacting with the environment. Every time you breathe, move your leg, push a door you lose energy. Where does it go? To your surroundings. Don't forget you emit infrared light all the time too.
Information exchange means making changes in the environment. If there's a clean floor tile ot doesn't bear any information if it doesn't change over time. If you step on it in a dirty shoe you create new information - your footprint.
Everything you do comes down to enery and information exchange.