* Solution: A solution is a homogeneous mixture of two or more substances.

* Compound: A compound is a substance formed when two or more different elements are chemically bonded together.

In a carbonated soft drink:

* Solvent: The primary component is water (H₂O).

* Solutes: Various solutes are dissolved in the water, including sugar, flavorings, and carbon dioxide (CO₂).

The carbon dioxide dissolves in the water to create carbonic acid (H₂CO₃), which gives the drink its fizz. This is a chemical reaction, but the dissolved CO₂ and the other components don't form a new compound. They remain distinct substances, making the soft drink a solution.