What technique is used to create volume at the roots of the hair during styling?

Backcombing is a technique specifically aimed at creating volume at the roots of the hair during styling. By teasing or combing the hair towards the scalp, you create tangles that lift the hair away from the scalp, resulting in a fuller and more voluminous appearance. This method is particularly effective for individuals looking to add body and texture to their hairdo, especially for updos or styles that require extra height.

In contrast, straightening aims to smooth and flatten the hair, which does not contribute to volume at the roots. Curling adds waves or curls to the hair but does not necessarily enhance the volume at the base. Layering involves cutting the hair at varying lengths to create movement and shape, but its primary focus is not on boosting root volume specifically. The unique action of backcombing makes it the most effective choice for achieving heightened volume right at the roots.