Which of the following are categorised as consumers?

Options

A. Carnivores
B. Omnivores
C. Herbivores
D. all of these

Explanation

**Step-by-Step Solution:**

1. **Understand the Definitions**:
- Producers are organisms that can make their own food, primarily through photosynthesis. Plants are the main examples of producers.
- Consumers are organisms that cannot produce their own food and rely on other organisms for nourishment.

2. **Identify the Types of Consumers**:
- **First Level Consumers (Herbivores)**: These are animals that eat plants directly. Examples include deer, cows, and buffalo.
- **Second Level Consumers (Carnivores)**: These animals eat herbivores. Examples include lions and tigers.
- **Third Level Consumers (Omnivores)**: These organisms eat both plants and animals. Humans are a prime example of omnivores.

3. **Categorize the Organisms**:
- Look at the list of organisms provided in the question. Determine if they are producers or consumers based on the definitions and examples given.

4. **Conclusion**:
- All organisms that rely on other organisms for food are categorized as consumers. This includes herbivores, carnivores, and omnivores.

5. **Final Answer**:
- Therefore, all the organisms that are either herbivores, carnivores, or omnivores are categorized as consumers.

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