The position of the tongue
These irregular edges of the tongue indicate a low positioning in the lower jaw, which causes what is shown in the photo.
I remind you that the upper surface of the tongue should be in contact with the palatal ridges when not speaking or chewing, in order to benefit from the amazing advantages that follow.
Try saying: no, that is the correct position.
This way, you will avoid moving through space with altered mechanics, resulting in less neck tension and more energy available, which you can use to improve focus and mental concentration.
You will stimulate nasal breathing, enhancing nitric oxide production and the oxygenation of all body tissues.
Your balance and coordination will improve, since this is a physiological position that we have lost in the modern era.
I also remind you that a low tongue predisposes to issues such as gastroesophageal reflux—an excellent reason to be motivated to place it higher.
If the tongue is in contact with the palatal ridges, the shoulders and trapezius muscles will, as a consequence, be soft and relaxed—shall we bet?
Try it and let me know!