What are the two areas of hair design services?

The correct choice highlights the two primary areas of hair design services, which are wet design and thermal design.

Wet design refers to techniques used on hair while it is wet, such as cutting, setting, and styling with products that enhance the natural texture and form of the hair during this state. This method often includes practices like curling with rollers or blow-drying, which rely on the hair's moisture content to achieve the desired shape and volume.

On the other hand, thermal design involves the use of heat to style hair, such as curling irons, flat irons, or blow dryers. This area focuses on how heat can be applied to manipulate the hair's structure temporarily, creating curls, waves, or sleek hairstyles.

Together, these two areas encompass a broad range of techniques and styling methods that are essential for creating a variety of looks while addressing different hair types and desired outcomes.