Algae are autotrophs because they

Options

A. carry out anaerobic respiration
B. can manufacture their own food
C. feed on dead organisms
D. feed on other living organisms.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Algae**: Algae are simple organisms that primarily live in aquatic environments. They are characterized by their lack of true roots, stems, and leaves, and they possess a simple body structure known as a thallus.

2. **Presence of Chlorophyll**: Algae contain chlorophyll, a green pigment that plays a crucial role in the process of photosynthesis. This pigment allows algae to capture light energy from the sun.

3. **Photosynthesis Process**: Photosynthesis is the process through which algae (and other plants) convert light energy into chemical energy, specifically glucose, which serves as food. During this process, algae take in carbon dioxide and water, using sunlight to produce glucose and oxygen.

4. **Definition of Autotrophs**: Autotrophs are organisms that can produce their own food using light or chemical energy. Since algae can manufacture their own food through photosynthesis, they are classified as autotrophs.

5. **Conclusion**: Therefore, algae are called autotrophs because they can manufacture their own food through the process of photosynthesis, thanks to the chlorophyll they contain.

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