Still waiting for some reasoning about an upward buoyancy force on the bags, which is equal to the weight of the air displaced by the bags, and the force acting

Still waiting for some reasoning about an upward buoyancy force on the bags, which is equal to the weight of the air displaced by the bags, and the force acting on the cotton is bigger simply because the bag of cotton displaces more air (because it "appears larger due to its fluffy nature".)