The law or principle described in the definition is Archimedes' Principle.

Here's why:

* Archimedes' Principle states that the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.

This means that the object experiences an upward force (buoyant force) that is directly proportional to the volume of fluid it displaces. The heavier the fluid displaced, the stronger the buoyant force.

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