system
Given the following post, respond as if you're commenting on Reddit:
human
Which of the four fundamental forces determine concentration gradient movements?

There's osmotic pressure if there is a different concentration of some solute on one side of a compartment than another. Ultimately , what fundamental force is determining the strength of the pressure?
gpt
I wouldn't say it's any of the forces that give rise to any chemiosmotic potential, as it arises from statistics (i.e., driven by entropy).

Let's examine another case of entropy at work. There are only so many ways that a deck of card can be ordered sequentially. What is the "force" that causes a brand new deck of ordered cards to become disordered when you shuffle the deck? Nothing but pure statistical probability.

The idea is the same for concentration gradients. The "forces" of diffusion and osmosis arises simply because there is more movement in one direction than another. While you can argue that atomic and molecular collisions are mediated by electromagnetism, it by no means is a _result_ of it.