How does temperature typically affect the viscosity of fluids?

Viscosity is a measure of a fluid's resistance to flow, and temperature has a significant effect on it. As temperature increases, the kinetic energy of the fluid molecules also increases, which causes them to move more freely. This increased molecular motion allows the fluid to flow more easily, resulting in a decrease in viscosity.

In practical terms, this means that hotter liquids tend to flow more readily than cooler ones. For example, oil can flow easily when heated, but when it is cold, it becomes thick and resistant to flow. Thus, it is accurate to state that viscosity decreases as temperature increases, which is the principle that supports the correct answer. This relationship is crucial in many industrial applications, including those in the oil and gas sector, where temperature control is vital for ensuring fluidity and efficiency in processes.