The upward force found in all fluids is called buoyancy.

Here's a breakdown:

* Buoyancy is the upward force exerted by a fluid that opposes the weight of an immersed object.

* It's what makes things float.

* The magnitude of the buoyant force is equal to the weight of the fluid displaced by the object. This is known as Archimedes' principle.

Let me know if you'd like more details on how buoyancy works or want to explore examples!