The hydrostatic pressure that makes a diluted solution diffuse solvent molecules across a semipermeable membrane into a concentrated solution is known as

A. osmotic pressure.

B. ambient pressure.

C. absorption pressure.

D. adsorption pressure.

The correct answer to the statement above is letter A, osmotic pressure.

It is because the osmotic pressure is a kind of pressure where it is applied to a certain solution. It is being applied to a certain solution for the prevention of having it to flow in an inward motion which takes place across the semipermeable membrane.

D i think, Vapor pressure lowering is a collective property because it has been found that when more moles of solute are added to solvent, it has lower's the solvent's vapor pressure (Raoult's Law).