How does carbon dioxi make the fizz in fizzy drinks?

Carbon dioxide (CO2) creates fizz in fizzy drinks through a process called carbonation. When CO2 is dissolved in the liquid under pressure, it forms carbonic acid, which gives the drink its characteristic tangy taste. When the pressure is released upon opening the bottle or can, the dissolved CO2 escapes in the form of bubbles, creating the fizzy sensation. This effervescence is what makes fizzy drinks enjoyable and refreshing.