Photoautotrophs carry out photosynthesis.________

Explanation

**Step-by-Step Solution:**

1. **Understanding Photoautotrophs**: Photoautotrophs are organisms that utilize light energy to produce their own food through the process of photosynthesis. They convert light energy into chemical energy.

2. **Energy Source**: These organisms primarily use light energy from the sun. This energy is harnessed to convert inorganic compounds (like carbon dioxide and water) into organic materials (like glucose).

3. **Types of Organisms**:
- **Eukaryotic Photoautotrophs**: These include plants and some algae. They have specialized cellular structures called chloroplasts that contain chlorophyll, the pigment responsible for absorbing light.
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