Autotrophs are called producers because they

Options

A. produce oxygen gas
B. prepare their own food
C. obtain their food from other organisms
D. none of these

Explanation

**Step-by-Step Solution:**

1. **Definition of Autotrophs**: Autotrophs are organisms that can produce their own food. They are not dependent on other organisms for their nutrition.

2. **Why are they called Producers?**: Autotrophs are referred to as producers because they create their own food through a process called photosynthesis. This ability to produce food independently distinguishes them from other organisms.

3. **The Process of Photosynthesis**: The primary process by which autotrophs, particularly green plants, produce food is photosynthesis. During this process, plants use sunlight, carbon dioxide (CO2), and water to create glucose (a type of sugar) and oxygen.

4. **Role of Chlorophyll**: Chlorophyll, a green pigment found in plants, plays a crucial role in photosynthesis. It absorbs sunlight, which is essential for the process.

5. **Conclusion**: Since autotrophs can prepare their own food and do not rely on other organisms, they are classified as producers in the ecosystem.

**Final Answer**: Autotrophs are called producers because they prepare their own food through the process of photosynthesis, making them independent of other organisms for their nutrition.

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