Final answer:
The 3 strand braid using the under-hand technique is known as a Dutch braid, characterized by crossing the strands underneath to create a raised braid pattern on the head.
Step-by-step explanation:
A 3 strand braid using the under-hand technique is also known as a Dutch braid. This method involves crossing the strands of hair underneath each other, as opposed to the over-hand technique used in the more common French braid where strands are crossed over the top. In the Dutch braid, also sometimes called an "inverse braid" or "reverse braid", the stylist or individual braiding takes three strands of hair, beginning at the crown, and adds more hair to each strand as they cross hair underneath each other working their way down.
This creates an embossed braid pattern that sits on top of the head, appearing as though it is 3D or "popping" out, contrary to the nestled appearance of a French braid.
Professional hairstylists and beginners alike often use this technique to create hairstyles that are functional, intricate, and aesthetically pleasing. The Dutch braid ensures that the hair is tightly secured to the scalp, making it an excellent style for athletic activities, elegant occasions, and everyday wear. It requires some practice to master but offers a versatile way to style hair that suits various occasions and personal preferences.