What type of haircut involves a 90-degree elevation followed by over-directing to maintain length and weight at the perimeter?

The correct answer pertains to a long layered haircut, which is characterized by a technique that incorporates a 90-degree elevation of the hair. This elevation allows the stylist to create layers while maintaining some length. The subsequent over-direction during cutting is a critical step; it helps to keep the weight at the perimeter intact, resulting in a style that has both texture and movement without sacrificing the overall length.

Long layered haircuts are designed to remove bulk from the hair and add dimension, while still preserving a longer silhouette. This approach is particularly beneficial for individuals with thick or heavy hair, as it lightens the hair without drastically shortening it.

In contrast, the other haircut options serve different purposes or employ different techniques. A short layered haircut usually features more drastic elevation and is meant for shorter hair, creating layers that significantly change the overall shape. A blunt haircut involves cutting the hair straight across without layering, generally maintaining even length throughout. A tapered haircut typically involves gradually shortening the hair from the top down to the sides and back, which doesn't align with the method of using elevation and over-direction as described.