Final answer:
The factors affecting solution concentration include solubility, temperature, pressure, pH, and solubility, which is covered in option (3).
Step-by-step explanation:
The factors that affect the concentration of a solution include solubility, temperature, pressure, pH, and the presence of other chemicals that can alter these parameters. Solubility is directly influenced by temperature, with gas solubility typically decreasing as temperature increases. Pressure also affects solubility, as stated in Henry's Law, particularly for gases dissolved in liquids. The pH can change the solubility of compounds, especially those that can gain or lose protons. When considering the options provided, the correct choice that incorporates these factors is (3) Concentration, temperature, pressure, pH, and solubility.