What type of perm wrap consists of partings that contour to the shape of the client's head?

The curvature perm wrap is designed to create a wave pattern that follows the natural contours of the client's head. This technique is particularly effective for achieving a uniform look with softness and volume, as it allows the curls to form in a way that mirrors the shape of the head. By using partings that are curved rather than straight, the stylist can enhance the overall hairstyle, ensuring that the curls flow naturally and complement the client's features.

In contrast, horizontal perm wraps create curls that are arranged in a straight line across the head, which may not follow the head's contours as effectively. The stacked perm wrap often involves using larger sections on the lower part of the head and tapering to smaller sections on top, primarily focusing on creating volume rather than contouring to the head shape. The diagonal perm wrap consists of diagonal partings and aims at a different styling effect, often used for specific styling or to create a different type of curl pattern. Thus, the curvature perm wrap is uniquely suitable for contouring, making it the best choice among the provided options.