Which of the following characteristics does NOT pertain to viscosity?

Viscosity is a physical property of fluids that measures their resistance to flow. It describes how thick or sticky a fluid is, which affects how it pours and moves. Viscosity does indeed change with temperature; as a fluid is heated, its viscosity typically decreases, allowing it to flow more freely.

When considering the characteristics associated with viscosity, it is important to note that it does not have a direct impact on the color of a fluid. Color is determined by the absorption and reflection of light by the substance and is not influenced by how resistant the fluid is to flow. Therefore, indicating that a characteristic related to viscosity is its impact on color is inaccurate. The other options correctly describe behaviors or traits that align with the nature of viscosity.