Which technique is described as giving a light, airy appearance while providing support to the hair design?

The technique that is described as giving a light, airy appearance while providing support to the hair design is back-brushing. This method involves using a brush to gently backcomb sections of hair, which creates volume and texture. By pulling the brush through the hair in the opposite direction of growth, it lifts the roots and helps create a fuller look while also maintaining the shape and structure of the style. This results in a soft, buoyant effect that enhances the overall aesthetic of the hair design, making it seem lighter and more dynamic.

In contrast, texturizing generally aims to reduce bulk and create dimension in the hair without necessarily adding volume or the airy appearance associated with back-brushing. Smoothing focuses on creating a sleek and polished finish, which may counteract the lightness achieved through back-brushing. Curling is primarily a technique to create curls and waves, affecting the hairstyle's shape rather than its airy quality or support.