Answer: The correct answer is : D. Diffusion through a semipermeable membrane
Explanation: The semipermeable membrane is also called selectively permeable or partially permeable membrane. It is a membrane that allows certain molecules or ions to pass through it through diffusion. The step depends on several factors such as: concentration, temperature of the molecules or solute, osmotic pressure and electrochemical gradient.
Diffusion refers to the movement of particles from a section in which there are more of them (high concentration) into a section where there are less of them (low concentration) until both sections are equal.
