____ has little effect on the solubility of solids and liquids but does affect the solubility of gas. size…

Brief Explanations:

The solubility of solids and liquids is largely unaffected by pressure. However, the solubility of gases in a liquid is directly proportional to the pressure of the gas above the liquid (Henry's law). Size of solid affects dissolving rate not solubility much for solids - liquids. Stirring affects rate of dissolution. Temperature affects solubility of solids, liquids and gases.

Answer:

D. Pressure