What haircutting technique involves cutting hair at various lengths?

Layering is a haircutting technique that involves cutting hair at different lengths to create depth, movement, and texture. This approach allows the stylist to remove bulk from the hair while maintaining length, resulting in a cascading effect that enhances the overall shape of the haircut. By varying the lengths, layering can add volume to finer hair, reduce weight in thicker hair, and create softer edges, making it versatile for different hair types and styles.

In contrast, blunt cutting typically creates a straight edge with no layering, resulting in a more uniform and solid appearance. Thinning focuses on removing bulk from a haircut to achieve lighter, more manageable styles but does not necessarily involve varying lengths. Tapering, on the other hand, usually refers to a technique where the hair is gradually shortened from the top down to the sides and back, providing a faded effect rather than the varied lengths achieved in layering. Therefore, layering is distinct in its purpose and technique, making it the correct choice for the question regarding cutting hair at various lengths.