Passage: The food must come from a supplier that uses halal practices. Dhabīḥah (ذَبِيْحَة) is the prescribed method of slaughter for all meat sources, excluding fish and other sea-life, per Islamic law. This method of slaughtering animals consists of using a well-sharpened knife to make a swift, deep incision that cuts the front of the throat, the carotid artery, trachea, and jugular veins. The head of an animal that is slaughtered using halal methods is aligned with the qiblah. In addition to the direction, permitted animals should be slaughtered upon utterance of the Islamic prayer Bismillah "in the name of God".

Question: what does the deep incision does?
cuts the front of the throat, the carotid artery, trachea, and jugular veins