Explanation:

Omnivores:
Omnivores are organisms that have the ability to consume and digest a wide variety of food sources. They have a mixed diet that includes both plants and animals. Humans are classified as omnivores because we eat both plant and animal products.

Human beings as omnivores:
1. Teeth and Jaw Structure:
- Human beings have a combination of different types of teeth, including incisors, canines, premolars, and molars.
- Incisors are used for cutting and biting into food.
- Canines are used for tearing and ripping food.
- Premolars and molars are used for grinding and chewing food.
- This dental structure allows humans to consume and process both plant-based and animal-based foods.

2. Digestive System:
- Humans have a digestive system that is capable of breaking down and digesting a wide range of food sources.
- The stomach produces enzymes and acids that help in the digestion of both plant and animal proteins.
- The small intestine absorbs nutrients from the digested food, regardless of whether it is from plants or animals.
- The large intestine helps in the absorption of water and minerals from the remaining food.

3. Nutritional Requirements:
- Humans require a balanced diet that includes a variety of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.
- While plant-based foods provide carbohydrates, vitamins, and minerals, animal-based foods are rich in proteins, fats, vitamins (such as vitamin B12), and minerals (such as iron).
- Consuming both plant and animal products ensures that humans receive a wide range of nutrients necessary for their growth, development, and overall health.

4. Cultural and Individual Variations:
- It is important to note that while humans are classified as omnivores, individual dietary choices may vary due to cultural, religious, or personal preferences.
- Some individuals may choose to follow a vegetarian or vegan diet, excluding animal products entirely.
- However, from a biological perspective, humans have evolved as omnivores and have the ability to consume and digest both plant and animal products.

In conclusion, human beings are classified as omnivores because we have the anatomical, physiological, and nutritional characteristics that allow us to consume and digest both plants and animals.

, correct answer is B