Here's why:

* Liquid Solvents: These are the most common type of solvent, and examples include water, alcohol, and acetone.

* Solid Solvents: Metals are often used as solid solvents. For example, a solution of carbon in iron is called steel.

* Gaseous Solvents: Air is a common example of a gaseous solvent. Oxygen and nitrogen dissolved in water are examples of solutions formed with a gaseous solvent.

In summary, a solution is simply a homogeneous mixture of two or more substances, and the state of matter of the solvent doesn't limit the possibility of creating a solution.