According to Archimedes Principle, what aspect of the displaced fluid determines the upward force on an immersed object?

The correct answer relates to the concept of buoyancy and the relationship described by Archimedes' Principle. This principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by that object. Thus, the upward force acting on an immersed object is directly tied to the weight of the displaced fluid.

When an object is submerged in a fluid, it pushes away or displaces a certain volume of that fluid. The weight of this displaced fluid is what creates the buoyant force. Therefore, it is the weight—rather than attributes like volume or density alone—that prominently relates to the upward force experienced by the object.

It's important to clarify that while the volume of the fluid displaced indeed plays a role in determining the weight of the displaced fluid, and density is a crucial factor in understanding how this weight is quantified (since weight equals density times volume), the primary aspect that directly relates to the force exerted on the object is the weight of that displaced fluid. Therefore, in the context of the question, the weight of the displaced fluid is fundamentally what creates the upward buoyant force as outlined by Archimedes' Principle.