Here's why:

* Electrolyte: An electrolyte is a substance that conducts electricity when dissolved in a solvent.

* Saline Solution: Saline solution is primarily composed of salt (sodium chloride) dissolved in water.

* Conduction: When salt dissolves in water, it dissociates into positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are free to move, allowing the solution to conduct electricity.

Therefore, the presence of these mobile ions makes saline solution an electrolyte solution.