Final answer:
The prehensile part of the equine mouth is the incisors, which are used for biting and grasping food. The canines tear food, and the premolars and molars grind it.
Step-by-step explanation:
In the equine mouth, the prehensile role is played by the incisors. The eight incisors, with four on the top and four on the bottom, are the sharp front teeth that equines use for nipping and grasping food. Unlike the incisors, the canines are pointed and used for tearing, while the premolars and molars are situated behind the canines and perform the function of crushing and grinding the food as it moves further into the mouth. In essence, the incisors serve as the first contact for manipulating and acquiring food, making them prehensile in nature. The part of the equine mouth that plays a prehensile role is the premolars. Premolars are located between the canine teeth and molars and are used for mashing and grinding food.