* Buoyancy is the upward force exerted by a fluid (liquid or gas) on an object immersed in it. This force is what allows objects to float.
* Density is a property of the object and the fluid. The density of the object compared to the density of the fluid determines whether the object will float or sink.
So, while density is a crucial factor in buoyancy, it's not the force itself. Buoyancy is the force, and density plays a role in determining the magnitude of that force.
Here's a better way to describe the concept:
Buoyancy is the upward force exerted by a fluid on an object immersed in it. The magnitude of this force depends on the density of the object and the density of the fluid. If the object's density is less than the fluid's density, the buoyant force will be greater than the object's weight, causing it to float.