Fillers are used to equalize porosity and __________.

Fillers are essential tools in the hair coloring process, particularly when dealing with the porosity of hair, which refers to its ability to absorb moisture and color. The primary role of a filler is to help equalize porosity, ensuring that the hair absorbs color evenly throughout.

In this context, fillers are commonly used to add a base color. By doing so, they prepare the hair for subsequent color applications, helping to achieve a uniform and consistent color result. Adding a base color ensures that when additional colors or highlights are applied later, they will blend seamlessly and look natural.

While other options may relate to different aspects of hair treatment or color application, they do not directly pertain to the primary function of fillers. For instance, creating highlights involves a different technique and process, and removing excess moisture would typically be addressed through conditioning, rather than coloring. Enhancing texture usually refers to styling techniques rather than coloring. Therefore, the correct association with fillers is their role in equalizing porosity and adding a base color for optimal results in hair coloring.