Crushing and Grinding Food

The correct answer is option C - both premolars and molars.

Explanation:

Premolars:
- Premolars are the teeth located between the canines and molars in the human mouth.
- They have a flat surface with cusps or bumps on them.
- The function of premolars is to crush and grind food.
- The cusps on the premolars help in breaking down the food into smaller pieces by exerting pressure and grinding motion.

Molars:
- Molars are the teeth located at the back of the mouth.
- They are larger and stronger than premolars.
- Molars also have a flat surface with cusps.
- The main function of molars is to crush and grind food.
- The cusps on the molars help in further breaking down the food into smaller particles.
- Molars are especially important for chewing tough or fibrous foods, such as meat or vegetables.

Both Premolars and Molars:
- Both premolars and molars are responsible for the process of mastication, which is the mechanical breakdown of food through crushing and grinding.
- These teeth work together to break down the food into smaller pieces, making it easier to swallow and digest.
- The combination of the flat surface and cusps on both premolars and molars allows for efficient grinding and chewing of food.

Conclusion:
- In summary, both premolars and molars play a crucial role in the process of crushing and grinding food.
- The flat surface and cusps on these teeth help in breaking down the food into smaller pieces, making it easier to chew and digest.