What is created when one or more substances are evenly distributed in another substance?

A solution is formed when one or more substances, called solutes, are evenly distributed within another substance, known as the solvent. In a solution, the solute particles become molecularly dispersed throughout the solvent, resulting in a homogeneous mixture that maintains consistent properties throughout. This uniform distribution ensures that the solute cannot be easily separated from the solvent through filtration, and it typically appears clear, though it can be colored depending on the substances involved.

In contrast, an emulsion refers specifically to a mixture of two immiscible liquids, such as oil and water, stabilized by an emulsifying agent. A mixture is a more general term that can include solutions, emulsions, and other forms where substances don't chemically combine but merely intermingle. A suspension consists of larger particles dispersed throughout a liquid, which will eventually settle out if left undisturbed, indicating that the particles are not evenly distributed. Thus, the defining characteristic of a solution is its even distribution of solutes in a solvent, making it the most accurate answer to the question posed.