Explanation:

A solution is a homogeneous mixture of two or more substances. In the case of salt water, sodium chloride (NaCl) is the solute, and water (H2O) is the solvent. The solute particles are evenly dispersed throughout the solvent, and the mixture has a uniform composition.

Salt water is a solution because it meets the following criteria:

- Homogeneity: Salt water is a homogeneous mixture, meaning that its composition is uniform throughout. The salt particles are evenly distributed in the water, and there are no visible solid particles or phase boundaries.

- Stability: Salt water is a stable solution, meaning that the salt particles remain dissolved in the water and do not settle out over time.

- Composition: Salt water is a mixture of two or more substances: sodium chloride and water. The amount of salt dissolved in the water can vary, but the composition of the solution remains consistent as long as it is in equilibrium.