Final answer:
The correct hypothesis is that water will move towards higher salt concentrations as the salt concentration increases due to osmosis.
Step-by-step explanation:
The correct hypothesis based on the relationship between salt concentration and water movement would be: If the salt concentration increases, then the water will move towards higher salt concentrations because of osmosis. This statement reflects the process by which water diffuses across a semipermeable membrane. Osmosis dictates that water, the solvent, will naturally move from a region of low solute concentration (which corresponds to high solvent concentration), to a region of high solute concentration (which corresponds to low solvent concentration) to achieve balance. This means that water moves towards the side with a higher concentration of salt in an effort to equalize the solute concentrations on both sides of the membrane.