That's not quite right. Simple diffusion isn't the net movement of a solvent, but rather the net movement of a solute. Here's why:

* Simple diffusion is the movement of a substance (the solute) from an area of high concentration to an area of low concentration. This movement occurs passively, meaning it doesn't require energy.

* Solvent is the substance that dissolves the solute, creating a solution.

Think of it like this: Imagine you have a drop of food coloring in a glass of water. The food coloring (the solute) will spread out in the water (the solvent) until it is evenly distributed. This spreading out is simple diffusion.

Here's how the net movement of a solvent comes into play:

* Osmosis is the diffusion of a solvent (usually water) across a semipermeable membrane from a region of high solvent concentration to a region of low solvent concentration. This movement is also passive.

In summary:

* Simple diffusion: Movement of a solute from high concentration to low concentration.

* Osmosis: Movement of a solvent (like water) across a membrane from high concentration to low concentration.

Let me know if you have any other questions!