What occurs to the flow of a fluid as its viscosity decreases?

When the viscosity of a fluid decreases, the fluid becomes less resistant to flow. Viscosity is a measure of a fluid's internal friction or thickness; it indicates how easily the fluid can move. A high-viscosity fluid, such as honey, flows slowly because there is a lot of internal friction. Conversely, a low-viscosity fluid, like water, flows more freely with less internal friction.

As viscosity decreases, the intermolecular forces that resist movement become weaker, allowing the fluid particles to slide past one another more easily. This results in an increased flow rate. Thus, the correct conclusion is that a fluid flows more easily when its viscosity decreases, facilitating smoother and faster movement through pipes and other conduits.